It is fairly well settled among all but the grimmest misanthropes and most grasping misers that it is better to give than to receive. But even better still is getting to do both at once. For seven years now, the Restaurant at Meadowood, in Napa Valley, Calif., has provided that opportunity with its Twelve Days of Christmas charitable dinner series. For this year’s event, the chef Christopher Kostow has invited 11 guest chefs to prepare holiday meals, each accompanied by wines from one of California’s finest vi…