French Onion Soup: All About Alliums

Brain Body Diet Recipe | French Onion Soup | Sara Gottfried MD

If you love onions, you’ll love this French Onion Soup from Brain Body Diet. Here’s why you should be indulging in more onions. Allium vegetables, mainly onions, garlic, and leeks, raise glutathione – the body’s chief detoxer. Onions are chock-full of antioxidants, particularly flavonoids. As prebiotics, onions and garlic contain fiber and sulfur needed for optimal gut health and better digestion. These qualities mean that onions help improve mineral absorption and brain body balance. 

Stew up a pot of this soup on a dreary cold day for an instant boost. Even without dairy, this recipe is just like that classic comfort food but with even more benefits!


1 tablespoon grapeseed oil

3 large yellow or white onions, quartered and thinly sliced

6 cups vegetable broth, or 4 cups water plus 2 cups chicken bone broth

2 cups greens (kale, chard, or spinach), thinly sliced

1 bay leaf

1⁄2 cup fresh thyme, chopped

Sea salt to taste

1 teaspoon fresh ground pepper

1⁄2 cup grated vegan cashew nut cheese or nutritional yeast flakes 1⁄4 cup green onions, chopped (for garnish)



  1. Heat the grapeseed oil in a large pot and cook the onions until they are soft and browned.
  2. Add the broth, greens, and bay leaf. Season with thyme, salt, and pepper. Simmer over a low flame for 1 hour.
  3. Garnish with cashew nut cheese or nutritional yeast flakes and green onions.