Canyon Ranch spa's celebrity clientele poses a particularly challenging conundrum for a chef; how do you cook for people who want to eat well without looking well-fed? Judging from the recipes in Canyon Ranch Cooks, the trick is to emphasize vegetables, fruits, and grains, and plenty of protein from fish, soy, poultry, low fat dairy and beans. But the Canyon Ranch chefs make room for a little red meat, too, with recipes for lamb, beef, and veal. Some recipes use a bit of butter. And there are even desserts without so much as a dash of deprivation.