Cheesy Vegetable Casserole

Ingredients

• 3 cups broccoli florets
• 2 cups sliced carrots
• 1 cup chopped bell peppers (red, yellow, or green)
• 2 cups cauliflower florets
• 1 onion, finely chopped
• 2 cloves garlic, minced
• 3 tablespoons olive oil
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 2 cups shredded cheddar cheese
• 1 cup shredded mozzarella cheese
• 1/2 cup grated Parmesan cheese
• 1 cup milk
• 1/4 cup all-purpose flour
• 1 tablespoon butter
• 1 teaspoon dried thyme
• 1 teaspoon paprika
• 1/4 cup breadcrumbs