Your mushrooms, onion, and or scallions would be good in a chicken based broth, that means simmering chicken breasts until tender and using the broth for soup. Simmer Scallions and onions, brocoli, or spinach in a little amount of butter till tender, then add them to the broth about 2 cups, and a cup of water, throw in some wild rice, or egg noodles, pinch of sea salt, and simmer till done. Makes a good soup...Collard greens are bitter, substitute other green vegies for them spinach is very healthy. Thats what I would do.