This is my version of Giada De Laurentiis' recipe, which I ran across here on the Food Network.
Ingredients
Meatballs:
- 1 small onion, grated
- 1 tsp dried parsley
- 1 large egg white
- 1 teaspoon minced garlic
- 1 teaspoon salt
- 1 slice whole grain bread, toasted in the oven and ground into bread crumbs*
- 1/2 cup grated Parmesan
- 8 oz ground sirloin
- 8 oz ground bison (could use ground turkey, chicken, or pork)
- 1/8 tsp freshly ground black pepper

Soup:
- 12 cups low-sodium chicken broth
- 3 large handfuls of fresh baby spinach
- 2 large egg whites
- 2 tbsp freshly grated Parmesan, plus extra for garnish
- Salt and freshly ground black pepper
Directions
To make the meatballs: Stir the first 6 ingredients in a large bowl to blend. Then add the cheese, sirloin, and bison. Using a 1 teaspoons measuring spoon, portion out the balls and shape the meat mixture into 1-inch-diameter meatballs. Place on a baking sheet and set aside. To make the soup:1. Bring the broth to a boil in a large covered pot over medium-high heat. Add the meatballs and simmer until the meatballs are cooked through, about 8 minutes. Add the spinach and stir.
2. Whisk the egg whites and cheese in a medium bowl to blend. Stir the soup in a circular motion. Gradually drizzle the egg mixture into the moving broth, stirring gently with a fork to form thin stands of egg, about 1 minute.
3. Whisk the egg whites and cheese in a medium bowl to blend. Stir the soup in a circular motion. Gradually drizzle the egg mixture into the moving broth, stirring gently with a fork to form thin stands of egg, about 1 minute.

4. Season the soup to taste with salt and pepper. Ladle the soup into bowls and serve. Top with a pinch of parmesan cheese if desired.
