1 (7 oz.) can tuna, drained & flaked
1/2 c. fine fresh bread crumbs (2 slices bread)
1/2 c. chopped celery
2 tbsp. minced onion
1/3 c. mayonnaise
2 tsp. ketchup
1 tsp. lemon juice
4 hamburger buns, toasted
Lettuce & tomato slices

Combine first 4 ingredients. Blend next 3 ingredients. Stir into tuna mixture. Form into 4 patties. Fry in lightly oiled skillet over medium heat, about 5 minutes or until brown. Serve on hamburger buns with lettuce and tomato.