Sunday Baked Vegetable Casserole

Highlighted under: Baking & Desserts

I love a warm, comforting casserole on Sundays, and this Sunday Baked Vegetable Casserole is a delightful family favorite. Packed with a variety of colorful vegetables, it's not only delicious but also a nourishing option that makes my weekly meal prep a breeze. With layers of cheese and a crunchy topping, every bite brings a burst of flavor that everyone will enjoy. Plus, it’s perfect for using up any leftover vegetables in your fridge! I can’t wait to share this easy recipe with you.

Abigail Foster

Created by

Abigail Foster

Last updated on 2026-01-13T22:52:21.429Z

When I first made this casserole, I was surprised at how well the flavors complemented each other. Using fresh, seasonal vegetables not only enhances the taste, but it also brings vibrant colors to the dish. One small tip I discovered is to lightly sauté the vegetables first; it adds a depth of flavor that you won't get from just tossing them in raw.

Another fun aspect is that you can easily customize this recipe based on what you have available. Whether it's zucchini, bell peppers, or broccoli, everything works beautifully together. I've found that a sprinkle of fresh herbs before serving makes it extra special. This casserole has truly become a staple in my kitchen!

Why You'll Love This Recipe

  • Hearty and satisfying, perfect for a family meal
  • Loaded with nutritious vegetables and flavors
  • Easily customizable with whatever veggies you have on hand

Choosing the Right Vegetables

One of the best things about this Sunday Baked Vegetable Casserole is its versatility. You can easily change the assortment of vegetables based on your family’s preferences or what you have on hand. For instance, consider adding chopped carrots for extra sweetness, broccoli for a bit of crunch, or even eggplant for a meaty texture. Make sure to chop all the vegetables to a uniform size to ensure even cooking throughout the casserole.

When selecting vegetables, fresh produce typically provides the best flavor and texture. However, frozen vegetables can also work well if time is tight. Just be sure to thaw and drain them thoroughly to prevent excess moisture from making the casserole soggy.

Understanding the Cheese Layers

The combination of mozzarella and Parmesan in this recipe contributes to the dish's delightful flavor and texture. Mozzarella adds a creamy melt that's absolutely essential for that classic casserole gooeyness, while Parmesan lends a sharp, nutty finish that elevates the overall taste profile. To make it even more indulgent, you can experiment with adding ricotta cheese between the layers for a richer texture.

For a lighter option, consider using reduced-fat cheese varieties. They will still melt well but reduce the calorie count. Just keep in mind that the flavor might not be as robust. Additionally, if you're looking to keep this recipe dairy-free, use a plant-based cheese solution that melts well – many brands now offer great alternatives that blend beautifully in a casserole.

Customize and Store Your Casserole

This vegetable casserole is incredibly adaptable and can easily be adjusted to fit various dietary needs. If you're aiming for a gluten-free option, consider using gluten-free breadcrumbs or even crushed nuts as a topping for added crunch. You can also add some cooked quinoa or brown rice into the layers for extra protein and heartiness.

If you have leftovers, they can be stored in an airtight container in the refrigerator for up to four days. To reheat, simply cover the casserole with foil and place it in a preheated oven at 350°F (175°C) for about 20 minutes, or until heated through. It also freezes well; just be sure to cool it completely before transferring it to a freezer-safe container. Thaw it in the fridge before reheating for best results.

Ingredients

Gather these fresh ingredients to kick off your casserole:

Vegetables

  • 2 cups chopped zucchini
  • 1 cup diced bell peppers (red, yellow, green)
  • 1 cup sliced mushrooms
  • 1 cup chopped spinach
  • 1 cup diced tomatoes

Other Ingredients

  • 1 cup shredded mozzarella cheese
  • 1 cup grated Parmesan cheese
  • 1 cup breadcrumbs
  • 2 tablespoons olive oil
  • 1 teaspoon dried oregano
  • 1 teaspoon garlic powder
  • Salt and pepper to taste

Make sure to have these on hand before you start cooking!

Instructions

Here are the steps to create your delicious casserole:

Preheat the Oven

Preheat your oven to 375°F (190°C).

Prepare the Vegetables

In a skillet, heat the olive oil over medium heat. Add the chopped zucchini, bell peppers, and mushrooms, sautéing until softened (about 5 minutes). Stir in the spinach and tomatoes, cooking until the spinach is wilted. Season with oregano, garlic powder, salt, and pepper.

Layering the Casserole

In a baking dish, layer half of the sautéed vegetable mixture. Sprinkle half of the mozzarella cheese and half of the Parmesan cheese on top.

Add More Layers

Repeat the layering with the remaining vegetables and cheeses. Top with breadcrumbs evenly.

Bake

Cover with aluminum foil and bake for 45 minutes. Remove the foil and bake for an additional 15 minutes until the top is golden and crispy.

Serve and Enjoy

Let the casserole cool for a few minutes before serving. Enjoy your Sunday Baked Vegetable Casserole with a side salad or crusty bread!

Your delicious casserole is ready to be served!

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Pro Tips

  • For added flavor, try mixing in some fresh herbs like basil or thyme just before baking. You can also substitute vegetables based on the seasons or what’s in your fridge.

Serving Suggestions

I love to pair this casserole with a light side salad, which adds a refreshing contrast to the dish's hearty nature. A simple arugula salad with cherry tomatoes and a lemon vinaigrette works beautifully, as the brightness cuts through the richness of the cheeses. Alternatively, serve it alongside some crusty bread to soak up the delicious sauces.

For a more filling meal, you can enjoy this casserole as a main dish by adding some protein on the side. Grilled chicken, fish, or a hearty bean salad make great companions that complement the flavors without overpowering them. Feel free to get creative based on the tastes of your family!

Potential Troubleshooting Tips

If you find your casserole is too watery after baking, this can often be due to the moisture content in the vegetables. To avoid this, either sauté the vegetables longer to release excess juices before baking or choose firmer vegetables that retain less water, such as bell peppers or zucchini. Before layering, make sure the mixture isn’t too saucy for the best results.

Another common issue is uneven baking, resulting in some parts being overcooked or undercooked. Make sure to evenly distribute your vegetable and cheese layers throughout the dish. If possible, use a baking dish that allows for even heat distribution, such as glass or ceramic, to help avoid this issue.

Questions About Recipes

→ Can I prepare this casserole in advance?

Absolutely! You can assemble it a day ahead and store it in the refrigerator. Just pop it in the oven when you're ready to bake.

→ What other vegetables can I use?

Feel free to use any seasonal vegetables, such as eggplant, carrots, or kale. The recipe is very flexible!

→ Can I freeze this dish?

Yes, you can freeze it before baking. Just make sure to cover it tightly. When ready, thaw in the fridge overnight and bake as directed.

→ How do I store leftovers?

Store any leftovers in an airtight container in the refrigerator for up to 3-4 days. Reheat in the oven or microwave before serving.

Sunday Baked Vegetable Casserole

I love a warm, comforting casserole on Sundays, and this Sunday Baked Vegetable Casserole is a delightful family favorite. Packed with a variety of colorful vegetables, it's not only delicious but also a nourishing option that makes my weekly meal prep a breeze. With layers of cheese and a crunchy topping, every bite brings a burst of flavor that everyone will enjoy. Plus, it’s perfect for using up any leftover vegetables in your fridge! I can’t wait to share this easy recipe with you.

Prep Time20 minutes
Cooking Duration60 minutes
Overall Time80 minutes

Created by: Abigail Foster

Recipe Type: Baking & Desserts

Skill Level: Intermediate

Final Quantity: 6 servings

What You'll Need

Vegetables

  1. 2 cups chopped zucchini
  2. 1 cup diced bell peppers (red, yellow, green)
  3. 1 cup sliced mushrooms
  4. 1 cup chopped spinach
  5. 1 cup diced tomatoes

Other Ingredients

  1. 1 cup shredded mozzarella cheese
  2. 1 cup grated Parmesan cheese
  3. 1 cup breadcrumbs
  4. 2 tablespoons olive oil
  5. 1 teaspoon dried oregano
  6. 1 teaspoon garlic powder
  7. Salt and pepper to taste

How-To Steps

Step 01

Preheat your oven to 375°F (190°C).

Step 02

In a skillet, heat the olive oil over medium heat. Add the chopped zucchini, bell peppers, and mushrooms, sautéing until softened (about 5 minutes). Stir in the spinach and tomatoes, cooking until the spinach is wilted. Season with oregano, garlic powder, salt, and pepper.

Step 03

In a baking dish, layer half of the sautéed vegetable mixture. Sprinkle half of the mozzarella cheese and half of the Parmesan cheese on top.

Step 04

Repeat the layering with the remaining vegetables and cheeses. Top with breadcrumbs evenly.

Step 05

Cover with aluminum foil and bake for 45 minutes. Remove the foil and bake for an additional 15 minutes until the top is golden and crispy.

Step 06

Let the casserole cool for a few minutes before serving. Enjoy your Sunday Baked Vegetable Casserole with a side salad or crusty bread!

Extra Tips

  1. For added flavor, try mixing in some fresh herbs like basil or thyme just before baking. You can also substitute vegetables based on the seasons or what’s in your fridge.

Nutritional Breakdown (Per Serving)

  • Calories: 350 kcal
  • Total Fat: 18g
  • Saturated Fat: 8g
  • Cholesterol: 30mg
  • Sodium: 320mg
  • Total Carbohydrates: 35g
  • Dietary Fiber: 5g
  • Sugars: 6g
  • Protein: 15g