Put shallots, lime leaves, curry paste, egg and salt in a food processor. Process until smooth. Combine well with ground turkey, cornstarch and cilantro.
Wet both hands and make small meatballs, about 1″ in diameter. Heat 1/2 cup of water in a deep saucepan. Gently place meatballs in pan, and cook until water is just evaporated, turning meatballs after a few minutes to color all sides. Heat oil in a skillet. Brown meatballs and cook through.
Mix all ingredients together.
To serve, place one or two meatballs on each lettuce leaf. Spoon sauce on top and eat!