Step1:Remove the skin of yam and cut the hob in the running water.
Step2:Peel the purple potato and cut the hob.
Step3:Put the rice in the electric rice cooker, add some water, and boil the porridge for 1 hour.
Step4:When the rice porridge is cooked for 20 minutes, put in purple potato and yam. Finally, put in ice sugar for the last 15 minutes.
Cooking tips:Purple potato is rich in nutrition and has special health care function. It contains about 20% protein, including 18 kinds of amino acids. It is easy to be digested and absorbed by human body, including 8 kinds of vitamins such as vitamin C, B, a and more than 10 kinds of mineral elements such as phosphorus and iron. It contains a lot of anthocyanins with high medicinal value. Dr. masquel, a French scientist, found that anthocyanins are natural strong free radical scavengers. There are skills in making delicious dishes.