@SimbleByte - You are correct. The diverticulitis diet plan involves increasing fiber in the diet. Foods like whole wheat breads and crackers, vegetables, and certain fruits are recommended. Beans and lentils and smooth peanut butter are recommended as protein sources in addition to meat. Your physician may also suggest that you add a fiber substitute to your diet. It's important to drink lots of water when you increase your fiber intake. When a patient is first diagnosed with diverticulitis, a physician may recommend a liquid diet for a few days to rest the colon. The patient then begins adding more dietary fiber upon resuming the consumption of solid food. Doctors used to recommend that diverticulitis patients avoid eating corn, nuts, and popcorn or seeds because these foods are considered hard to digest and might lodge in the diverticula and cause inflammation and infection. Current research, however, indicates that there isn't any hard evidence to support the recommendation to avoid these foods.