1 cup (250 ml) rock crab meat 1 cup (250 ml) sliced celery 1/2 cup (125 ml) chopped green pepper 3/4 cup (175 ml) sliced mushrooms 1/4 cup (50 ml) chopped onion 3 tomatoes, chopped 2 tsp. (10 ml) vinegar 1/4 tsp.(1 ml) sugar 1/4 cup (50 ml) mayonnaise salt and pepper to taste Combine all the ingredients in a bowl, then toss to mix well. Chill thoroughly. Serve on lettuce. Serves 6.