In a bowl, add brown sugar, cinnamon, nutmeg and mace. Mix together. Reserve 1 cup of mixture to be used for topping.
In a separate bowl, mix together apples and lemon zest.
Cover the bottom of Dutch oven pan with bread crumbs and bits of butter. Layer bottom with some sliced apples and brown sugar with a few pats of butter on top. Repeat with another layer until the pan is filled.
For the top layer, combine reserved cup of bread crumbs, melted butter and 1 cup reserved mixture. Sprinkle on top and top with more butter. Bake for 30 minutes until the golden brown.