I had roux en y bypass on the 22nd. My pre-op diet was:
Cream of Wheat and a protein shake for breakfast, snack a sugar free jello or pudding, lunch was broth and a low-fat Greek yogurt and dinner was low-fat cream of Chx or tomato soup with cottage cheese. I had one to two more shakes as snacks or more jello or sugar free popsicles. Also at least 64oz of water!