Fit piecrust into a 9" deep dish pie plate according to package directions; fold edges under and crimp. Whisk together eggs and next 5 ingredients until mixture is smooth; stir in chopped pecans and chocolate chips. Pour into piecrust.
Bake on lowest oven rack at 350° for one hour or until set. Drizzle each serving with hot fudge topping, dollop with whipped topping and sprinkle with chopped chocolate.