My Mothers Apple Crisp

12 Large Apples, Sliced
1/2 tsp. nutmeg
1 tsp. cinnamon
1 1/2 cups brown sugar
1/4 cup margarine

Mix together and spoon over apples in 9x13 pan (I use 1 1/2 bags of frozen pie filling) Bake at 350 for 30 minutes