Stock up with lots of low carb, sugar free, high protein snacks. That way you are still sticking to the plan. My surgeon explained that the sugar intake is the biggest thing, because it allows your liver to shrink and reduces risk during surgery.
I did portioned out mini containers of t good foods, and it really helped. Some favorites were - Cottage cheese cups, sugar free jello, triple zero yogurt, cooked chicken, moon cheese, healthier popcorn, P3 Protein snacks. All easy and fulfilling.