Heat oven to 375°F. Spread pie filling in ungreased 8-inch square (2-quart) baking dish.
In medium bowl, combine all topping ingredients; mix until crumbly. Sprinkle over pie filling.
Bake at 375°F. for 25 to 30 minutes or until bubbly and golden brown. If desired, serve warm with frozen yogurt or whipped topping.