Please suggest what food should you not eat to avoid getting diverticulitis after you have allready had it?

High fiber diet: There is no proven way to prevent a recurrent attack of diverticulitis. The old rule of avoiding nuts and seeds has been disproven. My experience tells me that avoiding constipation and eating a high fiber diet (such as oatmeal) or taking fiber supplements every day (such as benefiber or metamucil) may prevent recurrent attacks, but there is no guarantee.

None: No study has demonstrated that any food is associated with causing diverticulitis. Enjoy whatever it is that you enjoy. If you're going to get a recurrence, you're going to get it. The food isn't going to be the culprit.