Preheat over to 350°
Peel, core and slice apples. Place slices in a bowl of cold water with a touch of lemon juice.
Mix both sugars with some cinnamon and nutmeg.
Grease a baking pan and cover with a cup of the breadcrumbs. Lay apple slices on top.
Sprinkle the apple layer with sugar mixture and dot each apple with butter.
Repeat layer of breadcrumbs, apples, sugar and butter.
Pour water over apples and spread last cup of breadcrumbs on top.
Cover with foil and bake for 50 minutes. Remove and let stand.