Tuna Cheesies

1 can tuna in water — drained
1/4 cup chopped onion
1/4 cup chopped celery
2 tablespoons mayonnaise
1/4 teaspoon salt — (optional)
1/4 teaspoon pepper
4 English muffins — halved
butter
8 slices tomato
8 slices processed cheese

…..
Set oven at broil or 550 degrees. Mix tuna, onion, celery, mayonnaise, salt and pepper. Spread English muffins with butter and broil until toasted. Spread tuna mixture on toasted English muffins and top with slice of tomato followed by a slice of cheese. Spread a very thin layer of mayonnaise over the top of the cheese to prevent burning. Broil 3 to 5 minutes or until golden brown.