8 cups peeled, cored, and thinly sliced tart apples
lemon juice
1/2 cup granulated sugar
3/4 cup plus 2 Tbls. all-purpose flour
1 tsp. cinnamon
1 cup quick oats
3/4 cup brown sugar
1/4 cup butter
3/4 cup chopped walnuts

Preheat oven to 350 Degrees F.

In 9-inch square baking dish or round 9" pie plate, mix apples (sprinkled with lemon juice to prevent browning) with granulated sugar, 2 Tbls. flour 
and cinnamon. In a bowl combine oats, brown sugar, 3/4 cup flour, and butter cut into 1/2-inch chunks. Rub with
fingers until butter pieces are absorbed. Stir in nuts gently and sprinkle topping over apples.

Bake in oven until apples are tender when pierced and topping is browned, 45 minutes to an hour. Cover topping with tin foil if it browns
too quickly. Serve slightly warm with vanilla ice cream.