Steps:
1. Wash sweet potato leaves, pork liver, pork and oysters in turn.
2. Cut pig liver and pork for later use.
3. Then add water to the pot to boil.
4. After the water is boiled, add sweet potato leaves, oysters, pork liver and pork in turn.
5. Then add lard to the ingredients.
6. After the water is boiled again, add salt and minced garlic to taste.
7. Add pepper to the bottom of the pot.