Combine apples, sugar and cinnamon.
Melt the butter in a deep skillet and cook the apples about 15 mins. (liquid should be mostly gone)
Spread the apples over the crust, leaving a small border.
Dollop the remaining dough on top as a crumb topping.
Bake for 25 to 30 minutes, until the topping is browned. Cool completely and cut into bars.