Whether you love to cook or consider it a chore, one thing remains true: Cooking your own meals can be the difference between a great evening and a terrible one.By knowing exactly what’s in your food, you can avoid ingredients that irritate your digestive system. “The upside of cooking at home is that you have control,” says Christine Lothen-Kline, RD, who has Crohn’s disease and works at Health Promotion On Call in Columbia, Maryland.In particular, dietary fiber — found in foods such as nuts and leafy green vegetables — can be very disturbing to an already irritated digestive tract, according to the Crohn’s & Colitis Foundation. Other common offenders include high-fat foods, such as butter, and lactose-rich foods, such as cheese and dairy products.Here are a few cooking tips from Lothen-Kline and home cooks with Crohn’s.