. . . "Bigger pieces of vegetable are really going to replicate the idea of a centerpiece.Acorn squash or sugar pumpkins stuffed with wild rice or other grains, carrots, celery, onions, nuts, dried cranberries and a tiny dice of hickory smoked tofu also make a flavorful, celebratory main dish, says Diane Morgan, author of two books on Thanksgiving and a new volume on root vegetables called Roots\" (Chro" .