1 can anchovies, chopped
2 cloves garlic, pressed
1 c. mayonnaise
1 tbsp. minced onion
2/3 c. heavy cream
2 tbsp. lemon juice
1/4 c. tarragon vinegar
1/4 c. chopped parsley
salt and pepper

Mix and let sit a while. Serve on romaine lettuce and shrimp.