What should I eat to recover?

Eat whenever given the option. Not a whole lot if you can't... Always have a bag of snacks on you and eat a handful when you feel like you should, even if your forcing it down your throat. Eventually your appetite will get greater and greater, and all these small meals are healthy for you and speeds up your metabolism... If your worried about being overweight. So yeah. Do what you can to build up a healthy appetite, seriously goodluck.