Sunday Baked Vegetable Casserole

Name: Sunday Baked Vegetable Casserole
Prep time: 30 min
Cook time: 45 min
Total time: 1 h 15 min
Yield: Serves 6
Ingredients: 2 cups zucchini, sliced; 1 cup bell peppers, chopped; 1 cup spinach, chopped; 1 cup mushrooms, sliced; 1 cup ricotta cheese; 1 cup mozzarella cheese, shredded; 1/2 cup grated Parmesan cheese; 2 eggs; 1 tsp garlic powder; Salt and pepper to taste; 1 tsp olive oil

Highlighted under: Sweet Moments Studio

When it comes to Sunday family dinners, I often find myself craving comfort food that doesn't skimp on flavor and nutrition. This Sunday Baked Vegetable Casserole has become a beloved staple in my home, packed with vibrant vegetables and a creamy sauce that ties everything together. I love how versatile it is, allowing me to use whatever fresh produce I have on hand. It’s a chance to enjoy wholesome ingredients in a delicious way, making it a perfect choice for a cozy gathering.

Created by

Elodie Brooks

Last updated on 2026-01-13T23:22:10.278Z

After trying countless vegetable dishes, this casserole stands out for its rich flavors and delightful textures. I've experimented with various combinations of vegetables, but my favorite base is a mixture of zucchini, bell peppers, and spinach. For extra creaminess, I incorporate a combination of ricotta and mozzarella, which gives it that comforting quality I crave on a lazy Sunday.

One key tip I've learned is to pre-roast the vegetables slightly before assembling the casserole. This locks in their flavors and enhances their sweetness, making every bite a burst of deliciousness. Trust me, this method elevates the dish from simple to extraordinary!

        Why You Will Love This Recipe
        Packed with nutrient-rich vegetables for a healthy meal
Creamy texture that satisfies without the heaviness
Great for meal prep and leftovers, saving time during the week

      

Exploring the Flavor of Fresh Vegetables

For this casserole, the selection of vegetables greatly influences the overall flavor. Zucchini provides a mild base that absorbs surrounding flavors, while bell peppers add a sweet crunch that pairs beautifully with the creamy cheeses. When roasting, aim for just enough time to achieve that golden-brown color; this caramelization deepens the sweetness of the vegetables, making each bite a delightful experience. Don’t shy away from seasonal produce—using vegetables like asparagus or eggplant can also elevate the dish’s complexity.

Incorporating fresh spinach not only adds nutrition but also contributes to the casserole's lovely green hues. Feel free to experiment with leafy greens such as kale or Swiss chard, adjusting the quantity to keep a balanced texture. If you want a sharper taste, try adding a handful of arugula closer to the baking step for a peppery kick. Each choice you make can redefine this dish, ensuring it remains unique every time.

The Key to a Creamy Texture

Achieving the perfect creamy texture is crucial for this casserole. The blend of ricotta cheese and eggs serves as a binding agent while keeping the dish light. Be sure to mix thoroughly to avoid any eggy texture. When incorporating the roasted vegetables, fold them delicate enough to maintain some structure yet well-distributed throughout the mix, which will maximize flavor in each scoop. If you prefer a lighter option, consider substituting part of the ricotta with Greek yogurt for a tangy twist.

Using a blend of cheeses, like mozzarella and Parmesan, not only enhances the flavor profile but also ensures a wonderful melt. A good rule of thumb is to aim for a 3:1 ratio of mozzarella to Parmesan for the top layer. This way, you get that gooey stretchiness from the mozzarella while the Parmesan offers a satisfying depth of flavor. Don't hesitate to experiment with smoked cheeses for added character or even a sprinkle of nutritional yeast for a dairy-free alternative.

Make-Ahead and Storage Tips

This Sunday Baked Vegetable Casserole is a champion of meal prep. You can assemble it a day ahead and leave it covered in the refrigerator until you're ready to bake. This also allows the flavors to meld beautifully overnight. Just remember to increase the baking time by about 10-15 minutes if transferring straight from the fridge to the oven. To ensure even cooking, allow it to sit at room temperature for about 20 minutes before baking.

Leftovers can be stored in an airtight container in the fridge for up to five days. This dish also freezes well, so if you find yourself with extra portions, consider freezing individual servings. Just wrap them securely in plastic wrap and then foil for best results. When ready to enjoy, allow the casserole to thaw in the fridge overnight, then reheat in the oven at 350°F (175°C) until warmed through, approximately 20-30 minutes.

Ingredients

Gather the following ingredients for the casserole:

Ingredients

2 cups zucchini, sliced
1 cup bell peppers, chopped
1 cup spinach, chopped
1 cup mushrooms, sliced
1 cup ricotta cheese
1 cup mozzarella cheese, shredded
1/2 cup grated Parmesan cheese
2 eggs
1 tsp garlic powder
Salt and pepper to taste
1 tsp olive oil

Add the ingredients to a baking dish for the final assembly.

Instructions

Follow these steps to prepare your casserole:

Roast the Vegetables

Preheat your oven to 400°F (200°C). Toss the zucchini, bell peppers, and mushrooms in olive oil, garlic powder, salt, and pepper. Spread them on a baking sheet and roast for about 15 minutes until tender and slightly caramelized.

Prepare the Casserole Mix

In a bowl, combine the ricotta cheese, eggs, and half of the mozzarella. Mix in the roasted vegetables and spinach, stirring until everything is well incorporated.

Assemble the Casserole

Transfer the vegetable and cheese mixture into a greased baking dish. Sprinkle the remaining mozzarella and Parmesan cheese on top for a deliciously crispy finish.

Bake

Bake in the preheated oven for 30 minutes or until the cheese is bubbly and golden brown. Let it sit for a few minutes before serving.

Enjoy your delicious casserole with a salad or crusty bread.

Pro Tips

For added flavor, you can experiment with herbs like basil or thyme. If you want a bit more spice, a pinch of red pepper flakes can elevate the dish nicely.

Serving Suggestions

This casserole is versatile and pairs wonderfully with a simple salad dressed with a light vinaigrette. A fresh green salad complements the creamy richness of the casserole, providing a refreshing balance. For a heartier meal, consider serving it alongside quinoa or whole-grain bread to soak up those delicious flavors.

If you're looking to make it a complete meal, I often serve this casserole with roasted chicken or grilled fish. The bright flavors of the vegetables and cheese contrast nicely with these proteins, creating a well-rounded dining experience. Feel free to garnish with fresh herbs like basil or parsley for an extra pop of color and taste.

Dietary Adjustments

This casserole caters well to dietary restrictions. To make it gluten-free, ensure that all your ingredients, specifically any packaged items like cheese, are certified gluten-free. You can also swap the eggs for a flaxseed meal mix (1 tablespoon flaxseed meal combined with 2.5 tablespoons water) to create a vegan version while maintaining the casserole's texture.

For a lower-carb alternative, consider replacing the zucchini with spaghetti squash or cauliflower rice. Both options provide a wonderful base and lend themselves well to the creamy sauce. Customize the spices as well; adding a pinch of nutmeg can elevate the flavor profile of the dish, especially if you're opting for cheese substitutes.

Questions About Recipes

→ Can I substitute the vegetables?

Absolutely! Feel free to use any seasonal or favorite vegetables you have on hand.

→ Is this casserole freezer-friendly?

Yes, you can freeze the uncooked casserole. Just make sure to cover it tightly and bake it directly from the freezer, adding a few extra minutes to the baking time.

→ How long can leftovers be stored?

Leftovers can be stored in an airtight container in the refrigerator for up to 3 days.

→ Can this dish be made ahead of time?

Certainly! You can prepare it a day in advance, refrigerate it, and bake it when you're ready to serve.