Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      can           tuna in water, canned
     1/4  cup           celery -- finely chopped
   1      tablespoon    green pepper -- (red or yellow for
                        -- color if you can)
     1/2  teaspoon      salt
   1      dash          freshly ground pepper
   1      tablespoon    green onion -- finely chopped
     1/4  cup           plain low-fat yogurt
   1      teaspoon      fresh lemon juice -- >or<-
   1      teaspoon      vinegar -- (Maruchan seasoned
                        -- gourmet rice
                        -- vinegar is sweet
                        -- vinegar)*
   1      tablespoon    grated American cheese

Preparation:

*(I get a LARGE bottle at Far-east food market and only that kind because it has a sweet flavor) Drain tuna well, then flake it into a bowl. Add remaining ingredients and mix well. Use 1/4 cup to spread on one slice of bread or an open-face sandwich or between two slices of bread for a regular sandwich, or mound on crisp lettuce.