Deep Dish Pea and Vegetable Casserole

Name: Deep Dish Pea and Vegetable Casserole
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Cuisine: American
Ingredients: 1 cup chopped cauliflower; 1 cup sliced carrots; 2 tablespoons butter; 2 tablespoons all-purpose flour; 1 cup milk; 1 teaspoon white sugar; 1 teaspoon salt; 0.5 teaspoon ground black pepper; 1 pound frozen peas, thawed; 1 onion, chopped; 1 cup green beans; 0.5 cup chopped green bell pepper; 1 tablespoon chopped garlic; 2 cups shredded Cheddar cheese, divided