Vegetables fill you up, contain fiber and antioxidants, and are low in calories. "Brighter colors are better," says Pachella, who recommends red cabbage, red peppers, squash, pumpkin, dark leafy greens and tomatoes. Veggies were the key to weight loss for Alicia Silverstone, who gave up her diet of "steak and doughnuts" in 1998 and became a vegetarian. The self-professed health nut told PEOPLE she has her own garden and grows lima beans and sweet peas. Also embracing the vegetarian lifestyle? Heroes star Milo Ventimiglia.