1Heat oven to 350°F. Grease 13x9-inch (3-quart) glass baking dish with shortening or cooking spray. In small bowl, mix 1 cup Bisquick mix, the nuts and brown sugar. Cut in 3 tablespoons firm butter with fork or pastry blender until mixture is crumbly; set aside.
2Spread apples in baking dish. In medium bowl, stir remaining filling ingredients until blended. Pour over apples. Sprinkle with topping.
3Bake about 55 minutes or until knife inserted in center comes out clean; cool slightly, about 30 minutes. Serve warm if desired with ice cream.