Microwave tortillas on high setting for one minute, or until softened. Press each tortilla into an ungreased jumbo muffin cup to form a bowl shape. Bake at 350 degrees for 10 minutes; cool. Combine chicken, taco seasoning and water in a skillet over medium heat. Cook, stirring frequently, until blended, about 5 minutes. Divide lettuce among tortilla bowls. Top with chicken and other ingredients, garnishing with a dollop of sour cream and salsa. Makes 8 servings.