Bought fresh and whole, sardines are ideal for grilling and barbecuing. Remove the scales by holding the fish under running water and brushing it from tail to head between your finger and thumb, then cook until the skin is crisp and charred and the flesh comes away easily. Sardines are delicious hot or cold, either served with robust tomato sauces that counteract the oiliness of the fish, or dressed with butter, lemon and fresh herbs and served with boiled potatoes.