1 head Romaine lettuce
1 (6 oz.) can tuna, drained
2 c. grapes, halved or quartered
1 (6 oz.) can water chestnuts
1/2 c. mayonnaise
1 tbsp. mustard
1 tbsp. dill
1 lemon, squeezed

Chop lettuce and add tuna, grapes and water chestnuts. Mix together mayonnaise, mustard, dill and lemon juice. Add to lettuce and toss.