Either frozen or homemade meatballs are tucked into a toasted hoagie bun along with marinara sauce and sliced cheese, then broiled until melted, bubbly, and delicious.
Spread the insides of each hoagie bun with butter and sprinkle lightly with garlic salt. Place on a sheet pan and broil for about 2-3 minutes or until golden brown.
Remove buns from the broiler and carefully add the warmed meatballs, 2-3 tablespoons of marinara sauce, a slice of provolone cheese, and a slice of mozzarella cheese.