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["Preheat the oven to 350F and line a baking sheet with parchment paper.", "Combine the dry ingredients first: whisking together the flour, baking powder and salt in a medium bowl.", "In a large bowl, beat the sugar, lemon zest and butter until creamy. Add the eggs one at a time, beating until incorporation and scraping down the sides in between.", "Add the flour mixture and beat until just blended, then stir in the cherries and (optional) pistachios.", "Form the dough into 12"" long x 3"" wide logs on the parchment paper. Bake for about 40 minutes, or until light golden. Cool for 30 minutes.", "Place the log on a cutting board and use a serrated knife to cut diagonally, 1/2""-3/4"" slices. Lay the slices on the baking sheet and bake for another 15 minutes, or until they are a pale golden color. While they are cooking, get a pot of water boiling for your double boiler. Cool completely on a wire rack.", "Place the chocolate chips in a small pot set over the pot of simmering water. Stir constantly to avoid burning the chocolate. When the chocolate is completely melted, dip the ends of the biscotti in and set them on a parchment sheet to set. Place all the biscotti in the refrigerator for about a half hour, until the chocolate firms up.", "They can be made ahead, or frozen for up to 3 weeks."]
