In this diet plan, author Barbara Rolls, Ph.D., shows readers how to eat large quantities of food and simultaneously reduce their caloric intake. She reasons that low-calorie, high-volume foods, such as fresh grapes and baked potatoes, fill the stomach faster than high-calorie, low-volume foods, such as raisins and potato chips. This plan includes healthier versions of traditional American favorites, like lasagna, burgers, and pizza.