Cream butter and sugar. Add yolk and flour. Cut in fruit and nuts. Shape dough into two rolls 2 inches (5 cm) in diameter and roll in waxed paper. Chill overnight. While still cold and waxed paper still on, take a sharp knife and cut thin slices (1⁄8 inch/3 mm). Set on greased cookie sheets, remove waxed paper and bake at 375°F (190°C) for 10 minutes. (Slightly brown edges).
Nutrition calculation is an estimation only. If you need nutritional calculations for medical reasons, please use a source that you trust.