Sunday Baked Vegetable Casserole

Name: Sunday Baked Vegetable Casserole
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Yield: 6 servings
Ingredients: 2 cups chopped broccoli; 2 cups diced bell peppers; 1 cup sliced carrots; 1 cup cherry tomatoes, halved; 1 cup corn kernels; 1 medium onion, diced; 3 cloves garlic, minced; 1 cup heavy cream; 1 cup shredded cheddar cheese; 1/2 cup grated Parmesan cheese; 1 teaspoon dried oregano; 1 teaspoon salt; 1/2 teaspoon black pepper; 1 cup breadcrumbs; 1/2 cup melted butter; 1/4 cup chopped fresh parsley

Highlighted under: Baking & Desserts

I love preparing this Sunday Baked Vegetable Casserole as a wholesome start to the week. The combination of fresh vegetables, creamy sauce, and a crispy topping makes it a comforting dish for any family gathering. I’ve experimented with various ingredients, and using seasonal produce always elevates the flavor profile. This casserole not only fills our bellies but also warms our hearts with its delightful aroma wafting through the kitchen. It’s perfect for brunch or as a hearty side dish at dinner, bringing everyone together around the table.

Created by

Brianna Tate

Last updated on 2026-01-13T20:37:15.792Z

When I first made this casserole, I was amazed at how a simple collection of vegetables could create such a fulfilling dish. I sautéed the veggies to release their natural sweetness before layering them into the baking dish, which made all the difference. I also play around with herbs and spices, often using fresh thyme and a pinch of nutmeg for that extra zing!

This casserole is fantastic for meal prep as well. I often make it on Sunday, and the flavors deepen as it sits. Plus, leftovers reheat beautifully, making it a delicious quick meal during the week. I highly recommend serving it with a light salad for a complete meal.

        Why You Will Love This Recipe
        Colorful array of vegetables that brighten your plate
Creamy texture balanced with a crispy topping
Versatile and customizable to suit your favorite ingredients

      

The Importance of Fresh Vegetables

Choosing the right vegetables for this casserole is key to achieving a vibrant flavor profile. Fresh, seasonal vegetables, such as broccoli, bell peppers, and carrots, not only enhance taste but also contribute to a beautiful presentation. Aim for a mix of colors; the visual appeal is considerable. When selecting your produce, look for firm, brightly colored vegetables with no blemishes or soft spots. They should feel crisp and fresh to the touch.

If you find yourself without a specific vegetable in the recipe, feel free to substitute with others. Zucchini, spinach, or asparagus could easily replace broccoli for a different spin. Just make sure to adjust the cooking time based on the water content of your substitutes—zucchini may need less time than carrots, which tend to hold their shape better.

Mastering the Casserole Technique

The layering of flavors is essential in this casserole. When sautéing the onion and garlic, cook until fragrant and slightly golden, about 2-3 minutes. This step builds a savory base that enhances the overall dish. Be careful not to overcook your vegetables; you want them tender but still keeping some crunch for contrast against the creamy base.

When mixing your casserole base, it’s important to ensure the cheeses melt evenly for a creamy texture. I recommend using room temperature ingredients to prevent clumping. Pouring the mixture over the vegetables rather than mixing can help maintain some of the layers and textures.

Ingredients

Gather the following ingredients for your casserole:

Vegetable Mixture

2 cups chopped broccoli
2 cups diced bell peppers
1 cup sliced carrots
1 cup cherry tomatoes, halved
1 cup corn kernels
1 medium onion, diced
3 cloves garlic, minced

Casserole Base

1 cup heavy cream
1 cup shredded cheddar cheese
1/2 cup grated Parmesan cheese
1 teaspoon dried oregano
1 teaspoon salt
1/2 teaspoon black pepper

Topping

1 cup breadcrumbs
1/2 cup melted butter
1/4 cup chopped fresh parsley

Ensure you have everything ready for a smooth cooking experience!

Instructions

Follow these steps to create your delicious casserole:

Preheat the Oven

Preheat your oven to 375°F (190°C) and grease a 9x13 inch baking dish.

Sauté the Vegetables

In a large skillet, heat a tablespoon of olive oil over medium heat. Add the onion and garlic, cooking until fragrant. Then add the broccoli, bell peppers, and carrots, sautéing until just tender, about 5 minutes.

Mix the Casserole Base

In a separate bowl, combine heavy cream, cheddar cheese, Parmesan cheese, oregano, salt, and pepper. Stir in the sautéed vegetables followed by cherry tomatoes and corn.

Prepare the Topping

In a small bowl, mix breadcrumbs with melted butter and chopped parsley. Set aside.

Assemble the Casserole

Pour the vegetable mixture into the greased baking dish. Evenly sprinkle the breadcrumb topping over the casserole.

Bake

Bake in the preheated oven for 30-35 minutes or until the top is golden brown and the casserole is bubbling.

Allow the casserole to cool slightly before serving. Enjoy your delicious creation!

Pro Tips

For a vegan option, substitute dairy products with plant-based alternatives. You can also use any vegetables you have on hand for a personal touch!

Storing and Reheating

This vegetable casserole stores well, making it a convenient option for meal prep. After it has cooled completely, cover it with plastic wrap or transfer it to an airtight container. It will keep in the refrigerator for up to 3 days. When you’re ready to enjoy it again, simply reheat in the oven at 350°F (175°C) until warmed through, about 20-25 minutes.

For longer storage, consider freezing the casserole before baking. Assemble the dish and cover tightly with aluminum foil. It can be frozen for up to 3 months. When you're ready to bake, just thaw it overnight in the fridge and then bake as directed, adjusting the time as needed to ensure it’s heated through and bubbly.

Serving Suggestions

This casserole is versatile and can be served as a hearty main dish or a filling side. Pair it with a green salad and a light vinaigrette to balance the richness of the casserole. For a complete meal, serve with grilled chicken or fish, which complements the vegetable flavors beautifully.

Another fun way to enjoy this dish is to transform it into a breakfast option. Serve alongside eggs or top with a fried egg for a boost of protein. It’s also delightful as a filling in wraps or as a topping for baked potatoes, adding a comforting touch.

Questions About Recipes

→ Can I prepare this casserole in advance?

Yes! You can assemble the casserole a day ahead and refrigerate it before baking. Just add a few extra minutes to the baking time if it's cold from the fridge.

→ What vegetables work best in this recipe?

Feel free to mix and match your favorite vegetables. Zucchini, spinach, and asparagus also work wonderfully in this casserole.

→ Can I freeze the leftovers?

Absolutely! The casserole can be frozen after baking. Just ensure it’s properly sealed, and it will keep for up to three months. Thaw in the fridge before reheating.

→ How can I make this casserole spicier?

To add some heat, toss in chopped jalapeños or a sprinkle of red pepper flakes into the vegetable mixture.