A crunchy oat topping complements every bite of creamy pumpkin pie. Refrigerated pie crust makes it easy!
Heat oven to 425 degrees. Place pie crust in 9-inch glass pie pan. In large bowl, mix filling ingredients until well blended. Pour into crust-lined pan. Bake 15 minutes. Reduce oven temperature to 350 degrees; bake 15 minutes. Sprinkle streusel over pumpkin filling. Bake 15 to 20 minutes longer or until knife inserted in center comes out clean. Cool completely, about 1 hour.
Meanwhile, in small bowl, mix streusel ingredients.
Gently fold orange peel into whipped topping. Serve pie with topping. Store in refrigerator.