Mushroom Barley Soup

Name: Mushroom-Barley Soup
Ingredients: 1 oz. dried porcini mushrooms; ¼ cup olive oil; 8 cloves garlic, finely chopped; 2 ribs celery, finely chopped; 2 medium carrots, finely chopped; 1 large yellow onion, finely chopped; 1 lb. white button mushrooms, thinly sliced; ¼ cup sherry; 8 cups beef stock; ½ cup pearl barley; 2 tsp. thyme leaves; 2 tbsp. fresh lemon juice; Kosher salt and freshly ground black pepper, to taste; ⅓ cup finely chopped parsley