You totally can! I'm actually doing a diet based off a book that was released in December of last year. You should check out the thread
Dr. Anderson's Simple Diet in the "General Diet Plans and Questions" area. Basically it's an easy and convenient "meal replacement" plan that uses shakes and meals from local stores. You have 3 shakes per day and 2 frozen entrees and you're also required to have a minimum of 5 servings of fruits and vegetables in addition.