barley soup recipe

Ingredients: 2 tablespoons olive oil 1 large onion, finely chopped 2 cloves garlic, minced 2 carrots, diced 2 celery stalks, diced 1 cup pearl barley 8 cups vegetable or chicken broth 1 can (14.5 ounces) diced tomatoes 1 bay leaf 1 teaspoon dried thyme