It's not uncommon for people to call themselves vegetarian, only to say that they sometimes eat fish and maybe poultry. What they're probably really interested in is a healthful, well-rounded diet, making them "flexitarians," a growing group that Kornfeld (The Voluptuous Vegan
) addresses in this winning cookbook. Pseudo-meat products (like tofu) are used sparingly, and dishes that do have them, such as Wilted Arugula with Braised Tempeh, Mango, and Red Onion, with its delightful intersections of salty and sweet, may conquer even their sworn enemies. Vegetarian offerings dominate, but there's a whole chapter on fish and chicken, which are generally simply prepared but then transformed by more complex sauces, as in the elegant Black Bass in Leek-Saffron-Tomato Broth. Kornfeld's instructions are fairly detailed, and helpful drawings illustrate some of the more difficult techniques, but many recipes can still demand time and patience. Cooks who are willing to put in the effort because they agree with Kornfeld about the need to get past fad diets and eat fresh, "unfussy" food will be thrilled with the possibilities this book provides for pleasing a variety of people and their different eating habits. (Sept.)