check second baking time verify baking dish size
Preheat oven to 425.F and grease a 1 1/2 qt. baking dish. Place apples in dish. Mix together the sugar, flour, salt, and egg in a separate container and then sprinkle on top of the apple. Pour butter over top.
Bake for 10 minutes, then reduce heat to 375.F and continue baking until golden.
Substituted 3/4 c brown sugar for 1 c granulated. Added 1.5 tsp cinnamon and 1/4 tsp nutmeg to topping. After dropping temp cooked 15 minutes. Would add 1/8 tsp nutmeg next time.