A simple tuna melt requires only tuna, mayonnaise, cheese and bread. Mixing the tuna and mayonnaise together, placing the mixture on a slice of bread and adding a slice of cheese on top gives diners a simple and easy tuna treat.
Kraft offers a simple version of the recipe that uses a 3-ounce can of tuna, 1 tablespoon of mayonnaise, 1 tablespoon of chopped green onions, 2 slices of bread and a single slice of cheese. The easy recipe calls for mixing the onions, mayonnaise and tuna and then assembling them as a sandwich with a slice of cheese added between the layers of bread. Grill the tuna melt to achieve the desired textures and consistency.
More advanced recipes, such as one available from Campbell's, call for placing the tuna mixture onto toasted bread and leaving the cheese on top in an open-faced sandwich design. The Campbell's recipe requires broiling the tuna melt until the cheese melts. The Food Network Kitchen suggests swapping the bread for a sturdier substitute, such as English muffins, and adding minced celery and red onion to alter the flavor and texture of the sandwich. Another recipe available on the Food Network website adds lemon juice, basil, cilantro, parsley and mint to the basic recipe for a very flavorful sandwich.