In fact, onion white boiled water large onion or small onion is OK.

Scallion white, also known as scallion stem white, scallion white head, is the bulb of the scallion root. Onion is an indispensable seasoning for most dishes.　Then, the method of boiling scallion white water is to wash the white of the small onion with whiskers, cut it into sections, and put it in a small pot to boil. Cut off the root white and root whiskers and wash, about 10 green onions to boil 200ML water, soak milk with green onion water.

Onion Introduction:

Onion (scientific name: Allium fistulosum?L?var.?gigantum Makino) is a biennial herb of the lily family, genus Allium. It is generally 100-150 centimeters long. Onion's root white, stringy fibrous roots are attached to the stem nodes of the shortened stems, which are extremely shortened in a globular or compressed globular shape, bearing multilayered tubular leaf sheaths in the upper part, and densely bearing fibrous roots in the lower part.

The onion has leaf holes at the junction of the leaf sheath and the leaf body. In addition to the photosynthetic efficiency of the onion leaf blade is related to the variety, the flower shoots are green, the flower shoots are hollow, bearing umbels at the top, the flower shoots bear umbels at the top, the outside of the inflorescence is covered by a white membranous spathe-like involucre, hermaphroditic flowers, the small flowers have slender pedicels, and the tepals are white.

The florets at the top of the inflorescence open first, and in turn open downward, and the fruit is a large fruit, easy to crack at maturity, easy to drop seeds, and the seeds are peltate, with a black seed coat. It is distributed in northwest and northeast China as well as north China.

Reference: Baidu Encyclopedia-Onion