This is an awesome recipe from The Bon Appétit Test Kitchen! The flavours really work well together. Not only is it fast, easy, satisfying, and delicious, it is healthy, vegetarian, and low calorie too! You can omit the feta to make it vegan. Recipe was printed in the latest Bon Appétit Magazine (Feb. 2009). To cut down the fat, eat them open-faced as a taco salad. Use a griddle to prepare multiple tacos at once.