Combine the broth, barley, onions, carrots, thyme, & sage in a large pot.
Bring to a boil. Reduce heat & simmer, covered, for 1 hour.
Meanwhile heat the oil in a large nonstick skillet over medium heat.
Add the garlic & sauté for 1 minute. Increase the heat to med.-high.
Add the mushrooms, & season generously with salt & pepper.
Stir-fry the mushrooms until they give up their liquid & most of it has evaporated_about 5 min.
Set aside. To the broth, add the mushrooms, chicken, 1 tsp. salt, & pepper to taste.
Simmer, covered, for 20 minutes longer. Stir in the parsley.
Serve immediately.
Serves 4-5.