Shrimp Grape Tostada


Stir together the sour cream, 2 tablespoons lime juice, chile, salt and pepper; set aside. 

In a large bowl, combine the shrimp, grapes, cilantro, scallions, 3 tablespoons lime juice, Worcestershire sauce and water.  To serve, layer each tortilla with lettuce, the shrimp mixture and top with the sour cream mixture.