I was actually just looking through my diet a few minutes ago and I have a similar sounding pre op diet. It goes 1 shake with Breakfast, Lunch and Dinner and with Lunch you get 2oz lean meat, 1 slice of whole grain bread and lettuce and tomato and with dinner you get 1/2C potato or rice, 3oz lean meat, 1/2 C cooked veggies or 1-2C of raw salad with salad spritzers. Anyway I struggle with with my carbs.... I am just not even sure I could handle having the slice of bread and rice or potato without going overboard.