1. Spread flat side of each wafer with hazelnut spread; set aside. Scoop 8 ice cream balls, about 3 tablespoons each; keep in freezer until ready to assemble.
2. To assemble sandwiches, remove ice cream balls from freezer; let stand 1 minute to soften. Place 1 cream ball on 8 hazelnut-spread wafers. Top with remaining wafers; press gently together.
3. Sprinkle edges with nuts. Place sandwiches on baking sheet lined with waxed paper; freeze 3 hours or until firm. To store, freeze up to two weeks in self-sealing plastic bags. Makes 8 sandwiches.