Canh khoai m nu tm | Vietnamese Purple Yam Soup Nguyn liu | Ingredients:300g khoai m | 300gr purple yam500ml nc | 500ml water100g tm | 100g shrimp1 c hnh tm thi lt | 1 shallot, slice2 mc nc mm | 2tbsp fish sauce1 mcf ht nm | 1tsp stock powder1 mcf mui | 1tsp saltMt t tiu | a pinch of pepperNg m, ng gai | vietnamese rice paddy herb