1 pound uncooked medium elbow macaroni
1 1/2 cups chopped lean ham
1 1/2 cups frozen peas
Cooking spray
1/2 cup finely chopped onion
3 cups 2% reduced-fat milk
1 cup (4 ounces) shredded reduced-fat extrasharp cheddar cheese
1 cup (4 ounces) shredded Swiss cheese
3/4 teaspoon salt
1/4 teaspoon freshly ground black pepper
1/8 teaspoon ground red pepper
2 (1-ounce) slices white bread
2 tablespoons butter, melted