@SuffolkUnicorn normally in terms of the types of food you can eat, a couple of months. But some foods may never agree with you again, I don't eat bread, rice or pasta anymore and there's certain foods I used to enjoy and now cannot abide the taste. Weirdly; houmous- used to love it now can't stand it.
Obviously anything you do eat after surgery will be in a much smaller quantity than pre surgery and it's important to focus on eating lots of protein rather than carbs, because you fill up quickly you find you don't eat many carbs and focus on protein rich food instead.