THE CRUST: Process cookies in a food processor until finely ground. Stir together crumbs and melted butter. Press on bottom and up sides of a lightly greased 9-inch pie plate. Freeze 30 minutes or until set.
THE FILLING: Spread half of lemon curd on bottom of crust, and freeze 10 minutes. Spread half of Avocado-Key Lime Pie Ice Cream over lemon curd; freeze 15 minutes. Repeat layers with remaining lemon curd and ice cream, freezing as directed above after each layer.
THE TOPPING: Beat whipping cream, powdered sugar, and coconut extract at medium speed with an electric mixer until soft peaks form; spread over top of pie. Top with macadamia nuts, toasted coconut curls, and Key lime slices.