Filling

7 large Granny Smith apples, peeled, cored and sliced
1 cup fresh cranberries
3/4 cup sugar
1 1/2 Tblsp cornstarch
1 1/2 tsp cinnamon
1/4 tsp allspice
1/2 cup black walnuts, chopped (optional)

Topping 1 stick margarine, softened
1 cup sugar
1 egg
1 tsp vanilla
1 cup flour
1 cup old-fashioned rolled oats
3/4 tsp cinnamon

Preheat oven to 350F. Using an electric mixer on medium speed, beat magarine and sugar in a large bowl until creamy. Blend in egg and vanilla. Stir in flour, oats and cinnamon, thoroughly. In a separate bowl, combine sliced apples, cranberries, sugar, cornstarch, cinnamon, allspice and walnuts. Mix well. Evenly spoon apple mixture into a shallow 3 quart casserole. Spoon topping mixture evenly over apple topping. Bake 1 hour or until golden brown.