Don't feel bad...every doctor has his and hers own way of young the pre op diet . Dr. Pham lets people eat for his diet. so his point his that you don't get more than 600 call a day. my preop goes like this: shake for breakfast, shake and snack for lunch, small snack then dinner... Dinner is 4 oz. Chicken or beef or fish and a cup of green vegs...snacks are cottage cheese.oatmeal.or appliance cup. So all in all don't feel bad you had some food.