Scandanavian Shrimp Salad with Dill and Cornichons

Name: Scandanavian Shrimp Salad with Dill and Cornichons
Yield: 4 Servings
Ingredients: 1/3 cup mayonnaise; 1/4 cup chopped fresh dill; 1 tablespoon Dijon mustard; 1 tablespoon fresh lemon juice; 1 pound cooked peeled medium-size shrimp; 1 cup thinly sliced halved English hothouse cucumber; 1/3 cup sliced cornichons (gherkins); 8 butter lettuce leaves