"When the opportunity for celebrating knocks, answer the door and offer it some champagne " says Karen Bussen. Author of the bestselling "Simple Stunning" wedding series, Bussen now directs her expert's eye to a more intimate kind of festivity: the at-home party. Her simple stunning credo, though, remains the same: Create menus featuring wonderful ingredients in no-fuss, crowd-pleasing preparations; combine homemade and store-bought items in...