Tofu is made from raw soybeans that are soaked and pulverized into pulp, then boiled to make the soybeans more digestible. After filtering, calcium sulfate or magnesium chloride is added to the soy milk to coagulate it into curds and whey.
Soybeans help to ward off cancer and are a good source of natural estrogen.
Pressing the tofu creates a firmer texture and gets rid of any excess water that would otherwise make the greens and tofu soggy. You can also use baked, pressed tofu, in which case you just need to cut it into cubes. Either way, you will want to end up with 1 cup of tofu cubes. Wash the beet greens, drain, remove stems and shred. Heat the canola oil in a skillet and add the onion.