1 (15 1/2 oz.) can Great Northern (or pinto) beans, drained
1 (6 1/2 oz.) can tuna (in water or natural oil)
1 tomato, diced
1/4 c. chopped celery, zucchini, or cucumber
1 tsp. chopped parsley or chives
1 sm. to med. sliced mild onion

DRESSING:

Mix next three ingredients: 3 tbsp. white wine vinegar 1/4 to 1/2 tsp. sugar (if desired)

Toss dressing with other ingredients. Chill. Serve on lettuce leaf.