Heat oven to 350 degree F. Lightly grease a large cookie sheet. In a food process, process flour, sugar, lime peel and baking powder until blended. Add butter and cherries. Pulse until cherries are coarsely chopped. Spoon off and reserve 1 tablespoon of the beaten eggs. Add remaining eggs and the pistachios to food processor and pulse until dough is evenly moistened. Turn dough out on a well-floured work surface (dough is stickly). Divide dough in quarters. With hands, roll each portion into a 9-inch log. Place logs crosswise 3 inches apart on prepared baking sheet. Press logs to flatten to 2 inch wide. Brush with reserved eggs. Bake 25 minutes or until golden brown. Let cool on sheet on a wire rack 10 minutes. Loosen with a spatula and remove to a cutting board. Let cool 10 minutes longer. Using a large heavy knife, cut each log diagonally in 1/2-inch-thick slices. Arrange slices upright on clean cookie sheet (no need to grease sheet). Bake 14 to 15 minutes longer until crisp. Remove to wire rack to cool
