1. Grind 1/2 cup almonds in food processor or blender. Stir together flour, ground almonds and baking soda; set aside.
2. Beat butter and powdered sugar in large bowl until fluffy. Add egg, orange peel and almond extract; beat on low speed until blended. Add flour mixture; beat on low speed until blended.
3. Shape dough into two logs, about 1-1/2 inches in diameter. (Refrigerate dough about 15 minutes, if necessary, before shaping). Wrap each roll separately in wax paper or plastic wrap; refrigerate until well chilled, at least two hours.
4. Heat oven to 375°F. Lightly grease cookie sheets. Slice dough into 1/2-inch-thick slices. Place on cookie sheet about 2 inches apart.
5. Bake 6 to 8 minutes or until edges are lightly browned. Immediately place 3 chocolate pieces and 3 almond slices on top of each cookie, pressing down lightly. Remove from cookie sheet to wire rack. Cool completely.
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