2 cans tuna in water, drained 4 T. fat free mayonnaise 5 oz. cheddar cheese 5 slices white bread
Preheat oven to 350 degrees. Mix tuna and mayonnaise in a medium-sized bowl. Toast all five slices of bread and arrange them on a baking sheet. Divide tuna between the toast, top with 1 oz cheese each. Bake for 5 to 10 minutes or until cheese is melted.