1, purple potatoes contain anthocyanins and rice in the German starch chemical reaction will become blue.

2, purple potatoes: purple potatoes, also known as black potatoes (purple sweet potatoes), the flesh is purple to dark purple. It is rich in selenium and anthocyanins in addition to the nutrients of ordinary sweet potatoes. Purple sweet potato is rich in nutrients and has special health care functions, topping the list of cancer-fighting vegetables recently announced by the National Vegetable Cancer Research Center in Japan. It contains about 20% protein, including 18 kinds of amino acids, easy to be digested and absorbed by the human body, including vitamin C, vitamin B, vitamin A and other 8 kinds of vitamins and phosphorus, iron and more than 10 kinds of minerals, more importantly, it contains a large number of efficacy of the peculiar, medicinal value of anthocyanins, anthocyanins on more than 100 kinds of diseases have preventive and therapeutic effects, anthocyanins are known as the successor to water, protein, Anthocyanins are known as the seventh essential nutrient after water, protein, fat, carbohydrates, vitamins and minerals.

Anthocyanin is a natural purple pigment additives, it is safe and non-toxic side effects, although more expensive than synthetic pigments, but still sells well in the international market. Purple sweet potato can also be peeled, dried and crushed into whole powder, beautiful color, rich in nutrients, is an excellent food processing raw materials, can be used as a variety of pastries and ingredients.

3, purple sweet potato rice porridge practice:

Instruments: rice 100 grams; ? purple sweet potato ? A piece ? ; ? Water about 1300 ml

Practice:

(1) purple sweet potatoes washed, rice with a grinder a little grinding, not too broken.

(2) pressure cooker or ordinary pot with water, put rice, high heat boil to low heat simmer into thick.

(3) Slice purple potatoes and steam them in a steamer.

(4) steamed purple potatoes add a little water modulation into puree, put into a plastic bag, plastic bag corner cut a small mouth, feel free to do a variety of shapes on the rice porridge.

4, picture: