Hamburger Soup

Ingredients: 1 pound ground beef 1 Tbl. olive oil 1 cup each carrots, onions, and celery, diced 1/2 tsp. minced garlic 3 1/2 cups chicken broth (or two 14.5 oz. cans) 1 can diced tomatoes (14.5 oz.), liquid reserved 1/2 tsp. each thyme and salt 1/4 tsp. freshly ground...