1 (6 1/2 - 7 oz.) can tuna, drained and flaked
1/2 c. (2 oz.) shredded Swiss cheese
1/2 c. chopped celery
2 tbsp. finely chopped onion
1/4 c. mayonnaise or salad dressing
1/4 c. sour cream
Dash pepper

Combine tuna, cheese, celery, onion, mayonnaise, sour cream and pepper. Spread filling on bread slices or buns. Grill in oven on middle rack until bread is toasted and filling is heated through. Makes 6 servings.