Preheat oven to 350 degrees F.
Wash, core, and slice apples.
Spread apples in an 8 x 8 baking dish. Set aside.
In a large mixing bowl or bowl of a standing mixer, add flour, sugar, baking powder, salt, cinnamon, and nutmeg.
Begin mixing on the lowest speed. Slowly add the beaten egg.
Mix until the dough resembles very course sand.
Spread topping over apples.
Pour melted butter over top.
Bake for 40 minutes. Serve warm.