4 tablespoons (1/2 stick) unsalted butter (at room temperature)
3/4 cup Sugar
  grated zest of 1 lemon
2 tablespoons pure almond extract
2 large eggs
1 large egg white
2 cups less 2 tablespoons unbleached all-purpose flour (plus extra for handling the dough)
1 tablespoon baking powder
1 teaspoon salt
1/4 cup roughly chopped dried tart cherries
1/4 cup diced (1/4-inch) dried apricots (8 to 10)
1 cup slivered almonds (roughly chopped)