Cast iron retains heat, keeping the food hot on the table. Before using for the first time, the dishes should be washed thoroughly with warm soapy water. Then rub the cooking oil into the cast iron and roast it by placing it in an oven preheated to 200°C for 15 minutes. This matures the surface of the cast iron, which enhances durability and helps create a non-stick coating. Clean it after use by washing it with a damp cloth.