Once you've identified foods that cause your symptoms to flare, you can choose either to avoid them or to learn new ways of preparing them that will make them tolerable. To do that, you'll need to experiment with various foods and methods of preparation to see what works best for you. For instance, if certain raw vegetables trigger a flare, you don't necessarily need to give them up. You may find that steaming them, boiling them, or stewing will allow you to eat them without increased GI symptoms. If red meat increases fat in the stools, you could try eating ground sirloin or ground round to see if you can tolerate a leaner cut of beef. Or you might decide to rely on low-fat poultry without skin and fish as your main sources of protein.