BRING first 4 ingredients to boil in medium saucepan on medium heat; cook 5 min. or until apples are tender, stirring occasionally.
MIX cornstarch and water; stir into apple mixture. Return to boil; cook 1 min., stirring constantly. Remove from heat. Add dry gelatin mix; stir until completely dissolved. Pour into crust.
REFRIGERATE several hours or until firm.