Combine the broth ingredients with 2 quarts of cold water and bring to a boil. Reduce the heat to low and simmer 20 to 30 minutes. Meanwhile, slice the mushrooms into 1/4-inch strips.
Strain the broth. Add the onion to the broth and cook over low heat 3 to 5 minutes. Add the mushrooms and cook until they are tender, about 35 minutes.
Season to taste with salt and pepper. Ladle into shallow soup bowls and garnish with the thyme.
try adding some beef bullion granules and/or some spike which is a combination of spices and is great in/on pretty much anything. not sure where u are, but here in the okc metro area it's very hard to find and have to go to health food stores to buy it but it's worth it. i use the no salt one. try the bullion and good luck!!!
I could not make this broth taste like anything except water, and I used plenty of mushroom stems, and even a few whole mushrooms themselves. Any suggestions???