beef barley soup recipe

Ingredients 1 lb beef stew meat, cut into small cubes 2 tbsp olive oil 1 onion, chopped 2 carrots, peeled and chopped 2 celery stalks, chopped 3 cloves garlic, minced 8 cups beef broth 1 can (14.5 oz) diced tomatoes, with juices 1 cup pearl barley 1 tsp dried thyme