Place all the ingredients in the insert of instant pot, except for goji berries, salt and sugar. Pressure cook on high for 5 minutes. Wait for 1 minute and then turn the steam handle to venting. Open the lid carefully. Stir in goji berries and the residual heat will soften the berries. Season with salt and sugar to taste.
Cooking on stove-top:
Place 8 cups of chicken broth in a pot and bring to a boil. Add garlic, ginger, chicken pieces, better than bouillon (or bouillon cube) and red dates. Lower the heat and let it simmer for about 15 minutes. Add the watercress and tomato, cook for another 10 minutes or until the watercress and its stems are soft. Add goji berries last and cook for another 5 minutes. Season with salt to your taste. Remove from the heat and serve while it is hot
Add more ginger if you are using this recipe for confinement. My mom even add some sesame oil and a bit of wine into the soup
Chinese Watercress Soup (Sai Yong Choy Tong) https://whattocooktoday.com/chinese-watercress-soup.html