Place the onions, carrots, celery and cremini mushrooms in a large pot and saute over medium heat for 10 minutes. Add vegetable stock or water to ensure they don't burn.
Add the garlic, thyme, rosemary and bay leaves and cook for another minute. Add the vegetable stock and allow to simmer for 15 minutes.
Add the cooked barley and cook for another 10 minutes. Season with salt and pepper
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