Amaranth greens are the leaves of Chinese Spinach. Most varieties are mostly green with red coloration in the center which produces a reddish juice as they are cooked. Amaranth greens grow literally like weeds. In addition to the greens being edible, the seed of some varieties are eaten as a grain and others are milled into amaranth flour.
The greens only need about 3-5 minutes of cooking. A basic method is to add about 1 tablespoon of olive oil in a pan, add a few slices of fresh ginger and quickly saute, then add the leaves and cook until tender.