Preheat oven to 425°F.
In a medium bowl, mix together the flour, baking powder, salt, sugar, egg, shortening, and water with an electric mixer on medium speed. Pour batter into a 9-inch pie crust.
Combine the apple pie filling, lemon juice, and cinnamon and pout into center of batter but do not stir.
Bake 45-50 minutes.
