Preheat oven to 400°. On a rimmed cookie sheet, toast the pine nuts for 5 to 10 minutes or until golden brown. Set aside. In a large skillet, saute the ground turkey over Medium-High heat, stirring, until it changes color and is cooked through. Drain will and return to the pan. Stir in the cornstarch and hosin sauce. Heat and stir over Medium heat until bubbly. Add the pine nuts and the rice and stir until heated through. Spoon 1/3 cup of the hot turkey mixture onto each lettuce leaf. Serves 8 as a appetizer.