These are the best lemon bars I've ever tried. They have a fabulously buttery crust, a not too sweet or too tart curd-like lemony filling, and a thin chewy top. The recipe is from San Francisco pastry chef Emily Luchetti's cookbook, "Classic Stars Desserts". With more than a cup of fresh lemon juice, the lemon flavour is really pronounced, the filling sets up real well and the dusted sugar makes for a beautiful presentation. NOTE: The squares can be made a day in advance, covered and refrigerated. Bring to room temperature before serving. Dust with confectioner's sugar before serving.