Tuna Melt

Tuna Melt 1 can ( 7 oz.) tuna packed in water, drained 3 T. mayonnaise 1 celery stalk, finely chopped 2 T. red onion, finely chopped 1 tsp. dried dill 1 Roma tomato, sliced thinly 4 slices American cheese 4 sandwich thins (8 if you want a closed sandwich) In a medium bowl, combine the first 5 ingredients. Spoon 1/4 of mixture onto each of four sandwich thins. Top with tomato and cheese. Spray a nonstick skillet with cooking spray. Grill until cheese is melted and sandwich thins are browned and toasted.