A low residue diet limits dietary fiber to less than 10-15g per day. The goal is to decrease the amount of stool in the colon. Be sure to check the labels of what you are eating; often foods have added dietary fiber. Preparing foods so they are tender is key; simmering, poaching, stewing, steaming, braising, baking or microwaving. Thoroughly cooked food helps your body digest it more easily.
Low residue diets are often used for people recovering from recent bowel surgery, have conditions which make digestion painful or are preparing for a colonoscopy.