In a medium-sized saucepan, combine the gelatin, apple juice or unsweetened apricot juice, granulated sugar, lemon-lime juice, and lime juice. Stir until all of the ingredients are completely combined & bring it to a boil.
In a separate bowl, whisk together cornstarch and walnuts to form a paste. Add this to the gelatin mixture and stir until all of the ingredients are fully incorporated.
Pour the mixture into a 9-inch square baking dish that has been lightly greased with nonstick cooking spray. Place the dish in the refrigerator and let it chill for at least two hours, or until firm.
Once the mixture has chilled and set, remove it from the refrigerator and turn it out onto a lightly floured surface. Cut the candy into small 1-inch squares.
Roll each of the candy pieces in confectioners’ sugar to coat them completely. Place on a baking sheet lined with parchment paper or wax paper and let cool completely.