I never felt I was “giving up” anything. It soon dawned on this daughter of Cow Town that, while animal foods come in a few shapes and flavors, the world of plant food is almost endless: Think of green, red, yellow veggies. Root foods—from yams to purple potatoes. Legumes, including peas, beans, lentils, each with jillions of varieties. Fruits, from the bright, giant watermelon to the dark, delicate fig.