Watercress Soybean Big Bone Soup
1.
Material preparation~Soybeans sent in the supermarket~
2.
After the keel is boiled, pour out the blood water, add fresh water and continue to cook.
3.
Put the soybeans in a boil for 2 hours, you can add a small amount of water.
4.
Finally, add watercress and let it boil together for another 1 hour.