Hi Lisa!
My surgeon has me on a 'full' liquid diet. Basically anything drinkable and nothing that needs to be chewed. Water, broth, coffee, milk, yogurt, Protein shakes, cream Soups, pureed veggies, applesauce, 100% fruit or veggie juice, SF Jello or pudding, sherbert. Also hot Cereal including Malt o Meal, Cream of wheat, Coco wheats but NOT oatmeal - too sticky. I've noticed it is very similar if not the same as Stage 2 Post Op.
I bought the whey protein they have at Sams/Walmart. I bought vanilla so I could blend with yogurt, milk, berries (also adding sugar free jello powder adds flavor if you're out of berries).
Good luck to you! I've been on the above for a week and a half and have lost 10lbs.