Very Easy Mushroom Barley Soup

Heat the oil in a large soup pot over medium heat. Add the onion carrots celery and garlic; cook and stir until onions are tender and transparent. Stir in mushrooms and continue to cook for a few minutes. Pour in the chicken broth and add barley. Bring to a boil then reduce heat to low. Cover and simmer until barley is tender about 50 minutes. Season with salt and pepper before serving.