The regimen is quite straightforward: For two days (48 hours) you drink the leek broth every 2-3 hours, one cup at a time, either reheated or at room temperature, according to your preference. This broth will be your sole nourishment for the two days, leading up to Sunday dinner. For that meal, you can enjoy a small portion of meat or fish or a plant based alternative for a vegetarian diet (4-6 ounces—don't put away your kitchen scale just yet!), accompanied by two steamed vegetables lightly seasoned with butter or oil, and a piece of fruit.