Lemon-Lime Bars

Preheat oven to 350°F. Grease a 13x9x2-inch baking pan. Line pan with parchment, pressing the paper onto the bottom and up the sides of the pan; set aside. In a large bowl combine the 2 cups flour, the 1/2 cup powdered sugar, the cornstarch and salt. Using a pastry blender, cut in butter until mixture resembles coarse crumbs (mixture will look dry). Press firmly into bottom of prepared pan. Bake 15 minutes (crust will still look dry).

Meanwhile, in a medium mixing bowl whisk together the eggs, granulated sugar, half-and-half and 3 Tbsp. flour; divide in two bowls. In one bowl add lemon peel and lemon juice; in the other bowl lime peel, lime juice and green food coloring into other half. Pour the lemon filling over hot crust; bake 10 to 12 minutes or until set. Carefully pour lime filling over lemon filling; bake 10 to 12 minutes more or until set. Cool completely in pan on a wire rack.

Use paper to lift uncut bars from pan. Cut into bars. Sift over powdered sugar. Top with lemon and lime peel, if desired. Refrigerate to store. Makes 32 bars.