7 Best Vegetarian Casserole Recipes Ideas

Are you ready to take your vegetarian cooking to the next level? Dive into a world of mouthwatering flavors and tantalizing textures with our 5 Best Vegetarian Casserole Ideas.

These recipes are like hidden treasures, waiting to be discovered and savored. From the creamy Portobello Penne Pasta Casserole to the fiery Chili Rellenos Casserole, each dish is a masterpiece in its own right.

And if you’re looking for something healthy and delicious, our Zucchini Herb Casserole will not disappoint. Indulge your taste buds with the Carols Baked Ziti Casserole, a true Italian delight.

And don’t forget to try our twist on a classic with the Healthy Broccoli Cheese Bake. Get ready to embark on a culinary adventure you won’t soon forget!

Key Takeaways

  • Portobello Penne Pasta Casserole, Chili Rellenos Casserole, Carols Baked Ziti Casserole, and Healthy Broccoli Cheese Bake are flavorful and satisfying vegetarian casserole options.
  • Zucchini Herb Casserole, Spinach Lasagna III, and Layered Eggplant and Polenta Casserole are veggie-packed and nutritious vegetarian casserole options.
  • Carols Baked Ziti Casserole and Ice-Baked Potato-and-Raclette Casserole are comforting and filling vegetarian casserole options.
  • Nutritious and wholesome, vegetarian casseroles offer a variety of flavors and textures, are customizable, convenient to prepare, and suitable for different occasions and meals.

1. Portobello Penne Pasta Casserole


  • 2 cups penne pasta
  • 1-2 tbsp oil
  • 1 pound portobello mushrooms
  • 1/2 stick butter 3 cloves garlic, minced
  • 1/2 tsp dried basil
  • 1/4 cup flour
  • 2.25 cups 2% milk
  • 2.5 cups shredded mozzarella
  • 10 oz package of frozen chopped spinach, thawed and squeezed dry
  • 1/2 tsp each salt and pepper

If you’re a fan of hearty vegetarian casseroles, you’ll love the Portobello Penne Pasta Casserole. This baked pasta dish combines the earthy flavors of portobello mushrooms, the freshness of chopped spinach, the creamy texture of mozzarella cheese, and the satisfying chewiness of penne pasta.

It’s a recipe that has received rave reviews, with Courtney giving it a perfect 5-star rating. The combination of ingredients not only offers a healthy option but also creates an enticing flavor that will have you going back for seconds.

The Portobello Penne Pasta Casserole is a delicious way to enjoy a vegetarian meal, packed with flavor and cheesy goodness. Give it a try and see why it’s become a favorite for portobello mushroom lovers everywhere.

2. Chili Rellenos Casserole


  • 7 peppers poblanos, hatch or Anaheim
  • 6 eggs at room temperature
  • 1/2 tsp black pepper 3/4-1 tsp salt
  • 1/2 tsp baking powder 1/3 APF (all purpose flour)
  • 1/4 cup milk or heavy cream
  • Optional:
  • 1/4 onion, 2 Roma tomatoes and 1 jalapeños or Serrano chopped and mixed together Shredded queso Oaxaca or your favorite melting cheese

For the salsa:

  • 4 Roma Tomatoes Chile Serranos or Jalapeños Chile de árbol
  • 1/8 onion 1 garlic clove
  • 1/2 tsp oregano
  • 1/2 tsp black pepper
  • 2 tsp Salt

For a spicy and cheesy vegetarian casserole option, try the Chili Rellenos Casserole with its flavorful combination of chilies, cheese, and spices. This enchilada casserole is a perfect choice for those who enjoy a little heat in their meals.

Here are three reasons why you should give it a try:

  1. Bursting with flavor: The Chili Rellenos Casserole combines the smoky and mild flavors of roasted bell peppers with the richness of melted cheese. The combination of these ingredients creates a mouthwatering taste that will leave you wanting more.
  2. Protein-packed: This casserole isn’t only delicious but also nutritious. It’s made with black beans, which are a great source of protein and fiber. The addition of black beans adds a hearty element to the dish, making it a satisfying meal on its own.
  3. Versatile and customizable: You can make this casserole even more exciting by adding other ingredients such as green beans or corn. Feel free to experiment and make it your own by adding your favorite vegetables or spices.

3. Zucchini Herb Casserole


  • 3 zucchini or courgette
  • 1tsp garlic powder
  • 1tsp salt
  • 1egg or 2eggs if preferred
  • 2tbsp full coconut flour
  • 100g mozzarella cheese or Cheddar cheese,

To continue exploring delicious vegetarian casserole options, let’s dive into the flavorful world of the Zucchini Herb Casserole.

This dish combines sautéed zucchini with green beans, fresh basil, and summer squash, creating a medley of vibrant flavors. The zucchini is first cooked with green onions and garlic, giving it a savory base. Then, it’s seasoned with a combination of basil, paprika, and oregano, adding a burst of aromatic herbs to the dish.

To complete the casserole, the zucchini mixture is baked with cooked rice, tomatoes, and cheese until it becomes wonderfully bubbly and golden brown. The result is a delicious and flavorful vegetarian main dish option that will satisfy your taste buds and leave you wanting more.

Try this zucchini herb casserole for a healthy and delightful addition to your vegetarian casserole ideas repertoire.

4. Carols Baked Ziti Casserole


  • 2 1/2 cups uncooked penne pasta
  • 24 oz Alfredo sauce
  • 1 cup kale chopped
  • 1 cup broccoli chopped
  • 1 cup carrots chopped
  • 1/2 tsp salt
  • 1 tsp garlic powder
  • 1 tsp onion powder
  • 1/4 tsp ground black pepper
  • 2 tsp Italian seasonings
  • 2/3 cup shredded colby and cheddar mix cheese
  • 1 1/2 cup mozzarella

To make Carols Baked Ziti Casserole, gather the ingredients and preheat the oven to 350 degrees.

This comforting and filling vegetarian casserole is a perfect main dish option for a cozy gathering with friends or a comforting family dinner.

Here are three reasons why you should give Carols Baked Ziti Casserole a try:

  1. Layers of Deliciousness: This casserole is made with layers of ziti pasta, a creamy ricotta mixture, flavorful spaghetti sauce, and melted shredded cheese. Each bite is a delightful combination of cheesy, saucy goodness.
  2. Customizable and Versatile: While the classic Carols Baked Ziti Casserole is already delicious, you can customize it by adding your favorite vegetables or herbs for extra flavor and nutrition. Feel free to get creative and make it your own!
  3. Easy to Prepare: This baked ziti casserole recipe is straightforward and easy to follow. Once you have gathered the ingredients, simply assemble the layers, pop it in the oven, and let it bake to perfection. It’s a stress-free and delicious meal option.

5. Sweet Potato and Broccoli Casserole


  • 500 g broccoli or cauliflower
  • 500 g potatoes 200 g sour cream
  • 200 ml of milk
  • 150 g grated cheddar cheese
  • 8 tbsp heaped tablespoons of breadcrumbs
  • 2 eggs
  • 2 tbsp vegetable oil of
  • your choice to season salt and pepper to your own taste

Looking to add some nutritious and flavorful variety to your vegetarian casserole repertoire? Why not try a Sweet Potato and Broccoli Casserole?

This hearty dish combines the natural sweetness of sweet potatoes with the earthy flavor of cauliflower and the added nutrition of greens. Here are three reasons why this casserole should be on your dinner menu:

  1. Nutrient Powerhouse: Sweet potatoes are packed with vitamins A and C, while cauliflower is rich in fiber and antioxidants. Adding broccoli, greens like spinach or kale boosts the nutritional value even further, providing essential vitamins and minerals.
  2. Comforting and Satisfying: The combination of sweet potatoes and broccoli , creates a comforting and flavorful dish that will satisfy your taste buds and keep you full.
  3. Versatile and Adaptable: This casserole can be customized to suit your preferences. Add spices like cumin or paprika for an extra kick, or top it with cheese or breadcrumbs for added texture.

Try this Sweet Potato and Cauliflower Casserole for a delicious and wholesome vegetarian meal option.

6. French Onion Soup Casserole

To give you an idea of the ingredients and flavors in this casserole, here is a simple table:


  • 1 16 ounce baguette, cut into ¼-inch slices ¼ cup
  • 4 tablespoons unsalted butter
  • 2 large Vidalia onions halved and cut top-to-bottom into ¼-inch-slices
  • 3 large yellow onions
  • 1 teaspoon kosher salt
  • ½ teaspoon freshly ground black pepper
  • 5 fresh thyme sprigs leaves removed
  • 1 bay leaf ½ cup dry sherry
  • 1 cups unsalted beef broth
  • 2 cups unsalted chicken broth8 ounces about 2 cups shredded Gruyere cheese

For a hearty and veggie-packed casserole option, consider trying the French Onion Soup Casserole, which celebrates fresh produce in a flavorful way. This delicious dish combines the rich flavors of French onion soup with the comfort of a casserole. It is a great way to incorporate vegetables into your meal while still enjoying the satisfying taste of traditional comfort foods.

7.Layered Eggplant and Polenta Casserole


  • 2 tablespoons extra-virgin olive oil
  • 1 yellow onion, cut into ¼-inch pieces
  • 4 cloves garlic, minced
  • 2 pounds fresh or canned plum tomatoes, peeled and chopped
  • ¼ teaspoon coarse salt
  • 1 tablespoon balsamic vinegar
  • 1 tablespoon roughly chopped fresh oregano
  • ¾ cup loosely packed basil leaves
  • Freshly ground pepper
  • 1 ¼ pounds medium eggplant, sliced into ¼-inch rounds
  • 1 (16-ounce) log precooked polenta, sliced into ¼-inch rounds

source : https://www.marthastewart.com/348932/layered-eggplant-and-polenta

In this vegetarian casserole, you’ll layer tender eggplant and creamy polenta for a satisfying and nutritious dish. The combination of flavors and textures in this layered eggplant and polenta casserole is sure to impress your taste buds. Here are three reasons why you should give this dish a try:

  1. Eggplant Parmesan: This casserole takes inspiration from the classic Italian dish, Eggplant Parmesan. By layering thinly sliced eggplant with a rich tomato sauce and melty cheese, you get all the delicious flavors of Eggplant Parmesan in a convenient casserole form.
  2. Vegetarian Delight: If you’re looking for a meatless option that’s still packed with flavor, this casserole is the perfect choice. The combination of roasted eggplant and creamy polenta creates a hearty and satisfying meal that will leave you feeling nourished and satisfied.
  3. Wholesome and Versatile: This layered eggplant and polenta casserole isn’t only delicious, but also nutritious. With the addition of roasted vegetables and spinach, you’re getting a dose of vitamins and minerals. Plus, this casserole is versatile and can be served with a variety of sides, making it a great option for any occasion.

Frequently Asked Questions

What Is the Oldest Known Casserole?

The oldest known casserole, dating back to ancient Rome, was a dish made in a cooking vessel called a ‘caserola.’ It was used for combining various ingredients and baking them together, much like modern-day casseroles.

What Is the Key to Making a Good Casserole?

The key to making a good casserole is using fresh produce and veggies, creating flavorful and hearty meals. Incorporating greens adds nutrition and convinces picky eaters. Casseroles combine comfort foods with veggies, providing a warm and filling option.

What Binds a Casserole Together?

To bind a casserole together, ingredients like rice, eggs, cheese, and creamy sauces are used. They provide a cohesive texture and flavor, making the casserole deliciously satisfying. So, next time you cook one, remember these key elements!

How Do You Make a Casserole Not Soggy?

To make a casserole not soggy, make sure to pre-cook any vegetables with high water content, like zucchini. Also, avoid adding too much liquid and use a binder, like eggs or breadcrumbs, to help absorb excess moisture.


In conclusion, these vegetarian casserole ideas are a game-changer for anyone looking to add some excitement and flavor to their meals. Whether you prefer creamy and cheesy, fiery and flavorful, or nutritious and tasty, there’s a casserole option for everyone.

These recipes aren’t only delicious but also easy to make, making them perfect for any occasion. So why not try one of these mouthwatering vegetarian casseroles today and take your taste buds on a delectable journey?

Genie H
Genie H

I'm Genie Ho, your go-to dietitian and wellness advocate. Step into my digital haven where health and vitality take center stage. As a dedicated foodie with a passion for nourishing the body and soul, I'm here to empower you on your journey to wellness. From embracing wholesome ingredients to fostering positive habits, let's navigate the path to a healthier, happier you together. With a finger on the pulse of the latest research and insights, my mission is to equip you with the knowledge and tools needed to thrive. Welcome to a world where wellness reigns supreme!