1 can water packed tuna, drained
1/8 c. celery, chopped
1 sm. onion, chopped
1/2 c. light mayonnaise
4 slices your choice cheese
2 English muffins, split

Mix first 4 ingredients. Place a small amount on each 1/2 muffin. Top with slice of cheese. Bake until heated through and the cheese is melted.