Sunday Baked Vegetable Casserole

Name: Sunday Baked Vegetable Casserole
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Yield: 4 servings
Ingredients: 2 cups chopped zucchini; 1 cup bell peppers, diced; 1 cup spinach, roughly chopped; 1 cup mushrooms, sliced; 1 onion, chopped; 2 cups shredded mozzarella cheese; 1 cup ricotta cheese; 1 cup vegetable broth; 2 cloves garlic, minced; 1 teaspoon dried oregano; Salt and pepper to taste; 1 cup breadcrumbs

Highlighted under: Baking & Desserts

I absolutely love making a Sunday Baked Vegetable Casserole to enjoy with my family. It's a comforting dish that warms the soul and is packed with various fresh vegetables. The beauty of this recipe lies in its versatility, allowing me to use whatever vegetables I have on hand. While it takes a bit of time to bake, the result is truly rewarding with layers of flavors that blend together beautifully. This casserole is perfect for meal prep too, providing delicious leftover options throughout the week.

Created by

Katherine Blake

Last updated on 2026-01-13T22:34:07.728Z

Making this casserole became a family tradition on Sundays. As I prepare the vegetables, I am reminded of the fresh produce we picked from the farmer's market, which adds an incredible flavor. I've experimented with different combinations, but my favorite includes a mix of zucchini, bell peppers, and spinach. Each ingredient offers its own unique taste while working harmoniously with the cheesy layer on top.

The key to a great casserole is the layering technique. I start with a base of vegetables followed by a creamy mixture of cheese and spices, repeating the process until I reach the top. This creates a deliciously rich combination that is not only satisfying but also visually appealing. I've learned that allowing it to sit for a few minutes before serving enhances its flavor even more, making every bite delightful.

        Why You'll Love This Recipe
        Loaded with vibrant, fresh vegetables and rich flavors
Comforting cheese topping that melts perfectly
Great for leftovers or a special Sunday family dinner

      

Understanding the Vegetable Choices

The vegetable mixture in this casserole can be tailored to your family’s tastes or whatever you have on hand. For example, if zucchini isn't your favorite, consider substituting it with eggplant or yellow squash, which will offer a similar texture. Choose a variety of colorful bell peppers to enhance not only the nutrition but also the visual appeal of your dish. Each vegetable adds its unique flavor and texture, creating a rich tapestry of tastes with every bite.

When prepping vegetables, cutting them into uniform sizes ensures even cooking. Chop bell peppers into bite-sized pieces and slice mushrooms thinly for optimal tenderness. If you’re using frozen spinach, ensure to thaw and thoroughly drain it to prevent excess moisture from making the casserole watery.

Perfecting the Cheese Layer

The combination of mozzarella and ricotta cheeses adds creaminess while providing essential gooeyness to the overall dish. I recommend using whole milk or part-skim mozzarella for a melt that’s both stringy and rich. For additional flavor, consider mixing in some grated Parmesan cheese with the mozzarella layer; it enhances the savory profile and creates a pleasing crunch on top once baked.

If you're looking to lighten the recipe, low-fat ricotta can be a great substitute without sacrificing much flavor. Additionally, using a vegan cheese alternative allows those with dietary restrictions to enjoy this comforting dish, just make sure to check the melting properties for the best outcome.

Ingredients

Vegetable Mixture

2 cups chopped zucchini
1 cup bell peppers, diced
1 cup spinach, roughly chopped
1 cup mushrooms, sliced
1 onion, chopped

Casserole Assembly

2 cups shredded mozzarella cheese
1 cup ricotta cheese
1 cup vegetable broth
2 cloves garlic, minced
1 teaspoon dried oregano
Salt and pepper to taste
1 cup breadcrumbs

Instructions

Preheat the Oven

Preheat your oven to 375°F (190°C).

Prepare the Vegetables

In a large bowl, combine the chopped zucchini, bell peppers, spinach, mushrooms, and onion. Add minced garlic, oregano, salt, and pepper, mixing well.

Layer the Ingredients

In a greased casserole dish, layer half of the vegetable mixture. Spread half of the ricotta cheese on top, followed by half of the mozzarella cheese. Repeat these layers with the remaining ingredients.

Add Broth and Breadcrumbs

Pour the vegetable broth evenly over the top. Finally, sprinkle breadcrumbs on the surface for a nice crust.

Bake

Cover the dish with aluminum foil and bake for 30 minutes. Remove the foil and bake for an additional 15 minutes, or until the top is golden and bubbly.

Serve

Allow the casserole to cool for a few minutes before serving for enhanced flavor.

Pro Tips

Feel free to experiment with different vegetables or add herbs to customize the flavor profile to your liking.

Storage and Reheating Tips

This baked vegetable casserole is an ideal make-ahead dish. After assembling, you can store it in the refrigerator for up to two days before baking. If you're looking to prep well in advance, consider freezing the unbaked casserole. Just ensure it’s tightly wrapped in aluminum foil to prevent freezer burn. It can be frozen for up to three months. When you’re ready to bake, thaw it in the fridge overnight and follow the same baking instructions.

For reheating leftovers, place individual portions in the microwave for 1-2 minutes, or until heated through, being careful not to overcook. Reheated casseroles in the oven will benefit from a cover to retain moisture, baking at 350°F (175°C) for about 15-20 minutes should do the trick.

Serving Suggestions

To elevate the Sunday Baked Vegetable Casserole even further, consider serving it with a fresh side salad dressed with a zesty vinaigrette. The brightness of the salad complements the richness of the casserole beautifully. Additionally, a slice of hearty crusty bread or garlic bread would be perfect for soaking up any remaining cheesy goodness on the plate.

You can also transform this casserole into a main dish by pairing it with a protein such as grilled chicken or shrimp. For a vegetarian option, topping the casserole with toasted pine nuts or pumpkin seeds before serving adds a delightful crunch and nutty flavor, making each serving even more satisfying.

Questions About Recipes

→ Can I prepare this casserole in advance?

Yes, you can assemble the casserole a day ahead and store it in the refrigerator. Just bake it when you're ready to serve.

→ What can I substitute for ricotta cheese?

You can use cottage cheese or a plant-based alternative if you'd like a dairy-free version.

→ Can I freeze the leftovers?

Absolutely! Just allow the casserole to cool completely, then wrap it tightly and store in the freezer for up to 3 months.

→ What vegetables work well in this recipe?

You can use almost any vegetable you like. Broccoli, cauliflower, and carrots also make excellent additions.