1 (6 1/2 oz.) can tuna, drained (or ham, chicken, etc.)
1/4 c. finely chopped sweet pickle (relish)
1/2 c. mayonnaise or salad dressing
1/4 tsp. salt

Mix all ingredients; refrigerate until serving time. 1 1/4 cups filling (enough for 3 or 4 sandwiches).