Ingredients 材料: 250g sweet potatoes 番薯 700ml Chicken stock 雞高湯 1tbsp coriander seeds 香菜仔 1tsp fennel seeds (jintan manis) 茴香仔 3tbsp lemongrass 香茅 2tbsp galangal 南姜 1tbsp tumeric 黃姜 1tbsp garlic 蒜 2tbsp shallots 紅蔥 2tbsp red onion 大紅蔥 1/2 tbsp ginger 姜 2tbsp dried chillies 辣椒干 2tbsp fresh chillies 辣椒 1tbsp palm sugar 椰糖 2tbsp sugar 糖 2tbsp salt 鹽 add few dash of water if the soup is thickening. 如果湯太濃可加點水.