Ingredients
1 can (6 ounces) water-packed tuna, drained and flaked1/4 cup finely chopped celery1/4 cup finely chopped onion1/4 cup fat-free mayonnaise4 hamburger buns, split4 slices part-skim mozzarella cheese4 tomato slices4 lettuce leaves
Preparation
In a small bowl, combine the tuna, celery, onion and mayonnaise. Spread on bottom of buns; set bun tops aside. Top tuna mixture with a slice of cheese and tomato.
Place on an ungreased baking sheet. Bake, uncovered, at 350° for 12-15 minutes or until heated through and cheese is melted. Top each with a lettuce leaf; replace bun tops.
