operating procedure
1. Onion, celery and carrot are cut into pieces respectively, and thyme, fragrant leaves, broth, pepper and salt are added. After boiling, add salted pig's hands and cook with low fire for about 1 hour until the skin is soft.
2. Shred purple broccoli, cut tomatoes into pieces, cut onions into wood, fry with butter, season with salt and pepper, and pour in a little white vinegar.
3. Boil the milk, add the cardamom powder, slowly pour in the potato powder, stir it into mud, and add a little butter to make mashed potatoes.
4. Put the cooked pig's hand into the basin and serve with purple broccoli, tomatoes and mashed potatoes.
Special care should be taken to cook pig's hands with low fire to avoid skin rot.