Divide the trotters in half.

Add onion and ginger to the pot.

Pour in soy sauce, salt and monosodium glutamate, add appropriate amount of water, cover the pressure cooker and cook for 15 minutes.

Take out the pig's trotters and cut them into sections.

Add water to the pot and pour the trotters.

Pour the bottom iron into the pressure cooker.

Cook until it feels sticky. Turn off the heat and sprinkle with chopped green onion and coriander.

Pour the soup into a basin and let it cool completely, and it will become frozen pig's feet.

Dig it out piece by piece with a small spoon and drink it on a plate.