Yam mutton soup is a common Chinese medicinal diet. The yam in this soup has the effect of tonifying the three viscera, and the mutton itself has a good warming effect and can remove cold, so it is a tonic for deficiency-cold syndrome. Wash the green garlic and cut into oblique slices; Peel yam and cut into pieces; Peel and slice carrots; Yam, carrot and mutton are put into a pot together, other ingredients are added (salt is added when the pot is taken out), the mouth of the pot is covered with a heat-resistant plastic film, the pot is covered, the pot is moved into a steamer to heat water, and the pot is steamed for 30-40 minutes; Add salt and green garlic slices before turning off the fire, and serve in a bowl.