Heat oven to 350°F.
Place piecrust in 9-inch glass pie pan as directed on box for One-Crust Filled Pie.
In large microwavable bowl, microwave butter on high 50 to 60 seconds or until melted.
Stir in brown sugar and corn syrup until blended. Beat in salt, vanilla and eggs.
Stir crushed granola bars, walnuts, oats and chocolate chips into brown sugar mixture. Pour into crust-lined pan.
Bake 40 to 50 minutes or until filling is set and crust is golden brown. During last 15 to 20 minutes of baking, cover crust edge with strips of foil or pie shield to prevent excessive browning.
Cool at least 30 minutes before serving. Serve warm, at room temperature, or chilled with whipped cream or ice cream.
Store in refrigerator.