I'm 15 months post surgery (and in maintenance), and can eat about 1/2 of a cheeseburger and a few fries. It's great to be able to eat a little, enjoy the taste, and feel completely satisfied.
In the beginning, I would feel full after one bite, so instead of ordering a burger for myself, I would just have a bite of my husband's burger instead. When I eat out, I usually order with the intention of having leftovers, so try to order things that will reheat well. If it's fast food, I'll opt for the kids meal, and still end up being able to share it with one of my kids.