Sunday Baked Vegetable Casserole

Highlighted under: Baking & Desserts

We love to make this Sunday Baked Vegetable Casserole as a comforting start to our weekend. Packed with seasonal vegetables and topped with a golden, cheesy crust, it’s the perfect way to clear out the fridge. Every bite is a delightful medley of textures and flavors, satisfying both vegetarians and meat-lovers alike. Plus, it’s so easy to whip up, making it a great choice for lazy Sunday mornings when we want the taste of home-cooked goodness without too much fuss.

Piper Andrews

Created by

Piper Andrews

Last updated on 2026-01-13T20:34:15.573Z

Making this casserole was one of those lightbulb moments in the kitchen where everything just clicked. I decided to experiment with whatever vegetables I had left in the fridge and ended up with this delightful dish that captures the essence of comfort food.

What truly makes this casserole shine is the blend of herbs and spices that I toss in with the vegetables. Using a mix of thyme, basil, and a bit of garlic elevates the flavors, making each serving taste like a warm hug from the oven. I also discovered that letting it rest for a few minutes after baking allows the flavors to deepen and the layers to set perfectly.

Why You Will Love This Recipe

  • A colorful blend of seasonal vegetables that brightens your table
  • Rich, cheesy topping that creates a delightful crust
  • Great for meal prep – perfect for lunches throughout the week

Choosing the Right Vegetables

One of the best parts of this Baked Vegetable Casserole is its versatility. Using seasonal vegetables enhances both flavor and nutrition. For instance, zucchini and bell peppers not only add vibrant color but contribute moisture and sweetness. You can also substitute with vegetables like asparagus or cherry tomatoes, depending on what’s fresh in your fridge. Just ensure that the vegetables you choose have a similar moisture content to avoid a soggy casserole.

It's essential to chop your vegetables into uniform pieces, about one-inch in size, to ensure even cooking. I recommend sautéing firmer vegetables like carrots for a few minutes before mixing them into the casserole. This gives them a head start, and they’ll meld beautifully with the creaminess of the cheeses by the time it's done baking.

Perfecting the Cheesy Crust

The topping is where the casserole truly shines. Using a combination of mozzarella and Parmesan not only gives you that coveted golden crust but also adds layers of flavor. If you prefer a richer taste, consider mixing in some aged Gouda or Gruyère. This will elevate the dish and create a complex flavor profile that balances perfectly with the vegetables.

For an extra crispy topping, broil the casserole for the last 3-5 minutes of baking. Watch it closely to prevent burning - you’ll know it’s ready when it develops irresistible golden-brown edges. This caramelization enhances the flavor and gives a delightful crunch contrasting with the creamy interior.

Storage and Make-Ahead Tips

This casserole is not only delicious fresh out of the oven but also great for meal prep. You can assemble it the night before, storing it in the refrigerator before baking, allowing flavors to meld beautifully overnight. Just ensure to cover it with foil to keep it moist. If baking from cold, add an additional 10 minutes to your cooking time.

For longer storage, this dish freezes well. Cut it into portions and wrap them tightly in plastic wrap before placing them in an airtight container. When ready to eat, transfer a portion to the fridge the night before to thaw, and then reheat in the oven at 350°F (175°C) until heated through, usually around 20-30 minutes. This makes it a handy option for busy weeknights!

Ingredients

Vegetable Casserole Ingredients

  • 2 cups chopped mixed vegetables (zucchini, bell peppers, carrots)
  • 1 cup spinach, chopped
  • 1 cup ricotta cheese
  • 1 cup shredded mozzarella cheese
  • 1/2 cup grated Parmesan cheese
  • 3 eggs
  • 1 teaspoon dried thyme
  • 1 teaspoon dried basil
  • 2 cloves garlic, minced
  • Salt and pepper to taste
  • 1 cup breadcrumbs

How to Prepare

Cooking Instructions

Preheat the Oven

Preheat your oven to 375°F (190°C). Grease a 9x13 inch baking dish to prevent sticking.

Prepare the Vegetable Mixture

In a large bowl, combine the chopped mixed vegetables and spinach. Stir in the ricotta cheese, half of the mozzarella, half of the Parmesan, eggs, thyme, basil, garlic, salt, and pepper until everything is well combined.

Assemble the Casserole

Pour the vegetable mixture into the prepared baking dish. Spread it out evenly and then sprinkle the top with breadcrumbs and the remaining cheeses.

Bake

Bake in the preheated oven for about 45 minutes or until the top is golden brown and the casserole is set.

Rest and Serve

Let the casserole sit for 10 minutes before slicing. Serve warm and enjoy!

Enjoy Your Meal!

Secondary image

Pro Tips

  • For a vegan version, substitute ricotta and mozzarella with plant-based alternatives, and use flax eggs instead of regular eggs.

Serving Suggestions

This Sunday Baked Vegetable Casserole is wonderfully versatile in how you enjoy it. Serve it as a hearty breakfast or brunch alongside a fresh garden salad to balance the richness. For an extra kick, garnish with fresh herbs like chives or parsley before serving, adding a pop of color and a burst of freshness.

You can also pair it with a light vinaigrette or a dollop of sour cream for added tanginess. If you're looking to make it a more substantial main dish, consider adding a side of crusty garlic bread. This will soak up any creamy goodness left on the plate, making for a fulfilling meal.

Variations and Add-ins

To customize this recipe to your taste or dietary needs, consider adding protein options. Cubed cooked chicken or crumbled sausage can be mixed in for a non-vegetarian twist. For a plant-based option, you can include chickpeas or lentils for added protein without sacrificing texture.

Herbs offer another way to change the flavor profile; try adding fresh basil or dill for a Mediterranean touch. If you prefer a bit of heat, a sprinkle of red pepper flakes or diced jalapeños can add just the right kick to wake up your taste buds!

Questions About Recipes

→ Can I use frozen vegetables instead?

Yes, frozen vegetables can be a great substitute; just make sure to thaw and drain them before adding to the mixture.

→ How can I make this casserole gluten-free?

To make it gluten-free, use gluten-free breadcrumbs and make sure all other ingredients are certified gluten-free.

→ Can I add meat to this casserole?

Absolutely! Cooked chicken or sausage can be mixed in for added protein and flavor.

→ How do I store leftovers?

Store leftovers in an airtight container in the refrigerator for up to 3 days, or freeze for longer storage.

Sunday Baked Vegetable Casserole

We love to make this Sunday Baked Vegetable Casserole as a comforting start to our weekend. Packed with seasonal vegetables and topped with a golden, cheesy crust, it’s the perfect way to clear out the fridge. Every bite is a delightful medley of textures and flavors, satisfying both vegetarians and meat-lovers alike. Plus, it’s so easy to whip up, making it a great choice for lazy Sunday mornings when we want the taste of home-cooked goodness without too much fuss.

Prep Time15 minutes
Cooking Duration45 minutes
Overall Time60 minutes

Created by: Piper Andrews

Recipe Type: Baking & Desserts

Skill Level: Intermediate

Final Quantity: 6 servings

What You'll Need

Vegetable Casserole Ingredients

  1. 2 cups chopped mixed vegetables (zucchini, bell peppers, carrots)
  2. 1 cup spinach, chopped
  3. 1 cup ricotta cheese
  4. 1 cup shredded mozzarella cheese
  5. 1/2 cup grated Parmesan cheese
  6. 3 eggs
  7. 1 teaspoon dried thyme
  8. 1 teaspoon dried basil
  9. 2 cloves garlic, minced
  10. Salt and pepper to taste
  11. 1 cup breadcrumbs

How-To Steps

Step 01

Preheat your oven to 375°F (190°C). Grease a 9x13 inch baking dish to prevent sticking.

Step 02

In a large bowl, combine the chopped mixed vegetables and spinach. Stir in the ricotta cheese, half of the mozzarella, half of the Parmesan, eggs, thyme, basil, garlic, salt, and pepper until everything is well combined.

Step 03

Pour the vegetable mixture into the prepared baking dish. Spread it out evenly and then sprinkle the top with breadcrumbs and the remaining cheeses.

Step 04

Bake in the preheated oven for about 45 minutes or until the top is golden brown and the casserole is set.

Step 05

Let the casserole sit for 10 minutes before slicing. Serve warm and enjoy!

Extra Tips

  1. For a vegan version, substitute ricotta and mozzarella with plant-based alternatives, and use flax eggs instead of regular eggs.

Nutritional Breakdown (Per Serving)

  • Calories: 320 kcal
  • Total Fat: 20g
  • Saturated Fat: 10g
  • Cholesterol: 180mg
  • Sodium: 600mg
  • Total Carbohydrates: 25g
  • Dietary Fiber: 4g
  • Sugars: 5g
  • Protein: 12g