Cheesy Baked Vegetable Casserole

 Ingredients

Vegetables

• 2 cups broccoli florets
• 2 cups cauliflower florets
• 1 cup sliced mushrooms
• 1 red bell pepper, sliced
• 1 yellow bell pepper, sliced
• 1 cup cherry tomatoes, halved
• 1 small carrot, sliced
• ½ small onion, sliced
• 2 tbsp olive oil
• ½ tsp salt
• ½ tsp black pepper
• 1 tsp Italian seasoning
• ½ tsp garlic powder

Creamy sauce

• ½ cup sour cream
• ¼ cup mayonnaise
• 2 tbsp milk
• 1 tsp Dijon mustard
• 1 garlic clove, minced
• 1 tbsp fresh parsley or dill, chopped

Topping

• 1½ cups shredded mozzarella cheese
• ½ cup shredded cheddar cheese
• 2 tbsp grated Parmesan (optional)

 Method

1. Preheat oven to 400°F (200°C).
2. Wash and cut all vegetables into similar-sized pieces.
3. Place broccoli, cauliflower, mushrooms, peppers, tomatoes, carrot, and onion in a large bowl.
4. Add olive oil, salt, pepper, Italian seasoning, and garlic powder. Toss well.
5. Transfer vegetables to a greased 9×13-inch baking dish.
6. Whisk together sour cream, mayonnaise, milk, Dijon mustard, garlic, and herbs.
7. Pour the creamy sauce evenly over the vegetables.
8. Sprinkle mozzarella, cheddar, and Parmesan over the top.
9. Cover loosely with foil and bake for 20 minutes.
10. Remove the foil and bake another 10–15 minutes, until the vegetables are tender and the cheese is golden and bubbly.
11. Rest for 5 minutes, garnish with fresh herbs, and serve warm.

Approx. Nutrition per serving

• Calories: ~300 kcal
• Protein: ~14 g
• Carbohydrates: ~18 g
• Fat: ~20 g
• Fiber: ~5 g
• Sugar: ~7 g
• Sodium: ~550 mg
• Calcium: ~300 mg

Nutrition is an estimate and will vary depending on the cheese, mayonnaise, and portion sizes.

 Q&A

Can I use different vegetables?
Yes. Zucchini, green beans, spinach, or asparagus can be added.

Can I make it without mayonnaise?
Yes. Replace it with additional sour cream or plain Greek yogurt.

Can I prepare it ahead?
Yes. Assemble it, cover, and refrigerate for up to 24 hours. Bake when ready.

How do I make it vegetarian?
Use vegetarian-friendly Parmesan and cheese, since some Parmesan cheeses are made with animal rennet.

Can I make it healthier?
Use Greek yogurt instead of mayonnaise/sour cream and reduce the cheese slightly.

Is it gluten-free?
The ingredients listed are naturally gluten-free, but check packaged sauces, seasonings, and cheese for cross-contact or added ingredients if gluten-free eating is important.

• Author
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Sara Mitchell

Sara Mitchell is an expert restaurant content creator who writes easy-to-read guides about CAVA and other Mediterranean fast-casual chains in the United States. She covers locations, menus, prices, and hours, making it simple for visitors to find nearby restaurants and what to order quickly.

With years of experience in restaurant research and local SEO, Sara creates accurate, user-friendly guides that work for both people and search engines. Her goal is to help users go from search results to their nearest restaurant or menu choice with as few clicks as possible.

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