1 pint Prawns. 6 Tomatoes. Mayonnaise or Salad Dressing. Pick the prawns, leaving the skin on a few fine ones for a garnish. Peel and slice up the tomatoes and arrange them on a dish; put over them the prawns, and pour over all some mayonnaise or salad dressing. Place the other prawns round as a garnish with a few lettuce leaves broken up.