When you're hungry, what could be better than a mixture of mushrooms, onions, oats, brown rice, low-fat cheese, egg whites, bulgur wheat, walnuts and seasonings pressed into a patty and baked? Almost anything, you say? Not according to assorted Hollywood celebrities and health-conscious residents of Portland, Ore. They're all fans of a meatless competitor to the hamburger, called the Gardenburger. Developed by Paul Wenner, president of Portland's Wholesome and Hearty Foods Inc., it packs half the calories and one-fifth the fat of ordinary hamburgers.
Gardenburgers are not meant to taste like Big Macs. "We don't put in artificial hamburger flavor," says...