to make the crust: with a fork, combine the peanut butter and corn syrup, then gradually incorporate the cornflakes. when mixture becomes hard to handle, mix with hands. pat it down and up the sides of a 9-inch pie plate. to make the pie filling: pat the softened ice cream into the crust. smooth the top with a rubber spatula. wrap the pie with plastic wrap and freeze it for at least 2 hours or until ice cream is frozen solid. to serve: dip a knife into hot water and slice the pie into servings.top with chocolate sauce, whipped cream and chopped nuts.