Filed under: Recipe Rehab with Tanya Zuckerbrot , Nutrition & Supplements Getty Images A bowl of hot soup during the cold winter weather is just what the doctor ordered, especially when it features onions that are high in flavonoids and vitamin C , which are known to boost the immune system and fight off colds. Christine would like to make this soup for her father-in-law, who recently had heart surgery and needs to cut out a lot of fat from his diet. Traditional recipes for French onion soup call for slow-cooking onions in butter, simmering them in beef broth and topping with a cheese-covered baguette

Follow this link:
Healthy French Onion Soup Recipe