1 (6 1/2 oz.) can tuna, drained
2 tbsp. onion, finely chopped
2 tbsp. celery, diced
2 tbsp. mayonnaise or salad dressing
1/4 tsp. salt
1/4 tsp. pepper
2 English muffins, split or 4 slices bread
4 slices tomato (optional)
4 slices cheese (Swiss or Cheddar)

Combine first 6 ingredients. Toast and butter muffin halves. Layer on each: 1/4 of tuna mixture, a tomato slice and a slice of cheese. Microwave 20 seconds.