Easy Chicken with tomatoes

1 tablespoon extra virgin olive oil 2 large carrots , diced 2 stalks celery , diced 1 large onion , diced 1 elephant garlic clove, quartered and thinly sliced[...]

2 cups chicken broth 4 cups water 1 (14 1/2 ounce) can diced tomatoes 1/2 cup chopped celery 1 cup chopped carrot 1/2 small red onion (chopped) 1 bay leaf 1[...]