Component: 3 parts
Melt the butter in the pan and add it to the flour
Stir fry the flour and add the cold water. Add the water and mix well with the egg.
Heat the wok and add the fried onion and the mushroom slices. Add in the batter.
Mix well, add whipped cream and stir, season with salt.
After the pan, sprinkle some black pepper on it.