Preparation:
Combine shrimp, beans, pepper, celery and onion in a large bowl.
Combine remaining ingredients (except tomatoes), add 1/2 tsp salt and mix well. Pour over shrimp mixture; toss lightly to coat.
Cover and chill at least 2 hours or up to 24 hours, tossing lightly occasionally.
Spoon salad on lettuce lined plates, garnish with tomatoes. |