Spicy Mac ‘N Cheese recipes

Name: Spicy Mac ‘N Cheese recipes
Ingredients: 1 Tbs. unsalted butter; 4 slices white bread, cut into 1/2-inch squares; kosher salt; 8 oz. Cheddar cheese, shredded; 8 oz. Colby cheese, shredded; 8 oz. pepper jack cheese, shredded; 2 cups elbow pasta, cooked according to package directions; 2 tsp. flour; 1/2 tsp. kosher salt; 1/2 tsp. black pepper; 1/2 tsp. cayenne; 1/2 tsp. dry mustard; 1/8 tsp. grated nutmeg; 1/4 cup sour cream; 1 egg, beaten; 1/4 cup Vidalia or sweet onion, grated; 1 cup heavy cream; 1 cup half-and-half