I do not understand this 3 meals a day philosophy that some teams cling to. There is no way in the world (even at nearly 6 months post-op) I could get 100 grams of protein in 3 meals. I eat 7 times per day, about 2 hours apart. And I've lost 182 pounds. Obviously, eating more often, at least for me, is not prohibitive to weight loss.
In terms of what to eat, I would suggest focusing on lean protein and non-starchy vegetables. I would stay away from rice, pasta, potatoes, corn, bread, sugar, etc. Even at my stage, I still eat string cheese and cottage cheese daily. I would establish some macros that you want to serve as parameters for your daily eating, and then choose good foods (as mentioned above) accordingly.
Good luck!