1Preheat oven to 350°F. For the Crust, mix flour, confectioners' sugar, ginger and salt in large bowl. Cut in butter with pastry blender or 2 knives until mixture resemble coarse crumbs. Pat mixture into greased foil-lined 9-inch square baking pan. Bake 15 to 18 minutes or until crust is lightly browned. Remove from oven.
2For the Filling, mix granulated sugar, flour and baking powder in large bowl. Add lime juice, eggs, lemon extract and food color; whisk until blended. Pour filling over warm baked crust.
3Bake 20 to 25 minutes longer or until filling is set. Cool in pan on wire rack. Cut into bars.