1. Place the vegetables and fruits in the crisper and refrigerate, removing only unusable outer leaves. To prepare iceberg lettuce for crisping, remove only bruised leaves, separate the leaves properly and place in ice-cold water for at least 25 minutes. 2. Drain the vegetables and fruits thoroughly. Wrap loosely in a clean towel and place them in the refrigerator. 3. Vegetables like baby corn, french beans etc. should be cooked for a few minutes on a high flame. Baby corn takes about 2 minutes to cook while french beans and cauliflower take a little longer. Ensure that you do not overcook any vegetables.