French Onion Soup

Description
Homemade French onion soup built on a simple bone broth and topped with bread and cheese.

Ingredients

• For the broth: 1 pound bones, 1 yellow onion, 2 carrots, 2 celery stalks, 2 tablespoons apple cider vinegar, 1/2 bunch parsley, 4 cloves garlic, 2 teaspoons black pepper, 6 cups water, and 1 tablespoon kosher salt
• For the soup: 4 tablespoons butter, 3 large onions thinly sliced, 1 teaspoon kosher salt, 2 tablespoons soy sauce, 1 teaspoon black pepper, 4 slices French bread, 4 slices provolone cheese, and 1 cup grated Swiss cheese

Instructions

1. Simmer all broth ingredients together 2 to 4 hours, then strain and season to taste.
2. For the soup, melt the butter in a large pot and cook the sliced onions with the salt until soft and caramelized, 15 to 25 minutes.
3. Add the broth, soy sauce, and black pepper and simmer about 30 minutes.
4. Ladle into oven-safe bowls, top with bread and cheese, and broil until melted and browned if desired.