1/3 cup cold water
2 sticks butter
1/4 tsp. baking powder
1/2 tsp. salt
2 1/2 cups flour
1 egg
1 tbsp. cornstarch
2 tbsp. freshly squeezed lemon juice
1 tsp. cinnamon
1/2 cup sugar
2 1/2 pounds apples, peeled, cored and sliced
4 tsp. butter