I have gastritis. i'm on a diet but i don't know exactly what food to eat. can i eat soy? breaded soy steak but baked and without oil?

Gastritis : ... Is just a general term for inflammation in the stomach. Without more details on how you were diagnosed as having gastritis, it is impossible to know what kind of dietary recommendations to give you. Gen recommendations would be to avoid any particular foods which you notice cause or worsen your pain. Otherwise, I would need more details about your gastritis in order to give you better advice.