Caused by the soup. Use a white casserole to cook pumpkin porridge for the first time. The yellow color is due to the yellow color of the pumpkin itself. It is often cooked for a long time and the soup sticks to the sides of the pot. Just clean it with dish soap. A casserole is a type of cooking utensil. Traditional casseroles are ceramic products made of quartz, feldspar, clay and other raw materials that are not easy to conduct heat.