But if the dish turns black, it means that something has fallen off, either the quality of the pot is not up to standard, it is coated or something like that, or the pot is too dirty. The usual solution is to use a big fire in the kitchen to burn off the impurities on the pot and burn it red, so that the pot is the cleanest.
In addition, the first thing to buy a pot for a hotel is to burn it. It is silver-gray and usually burns black.