Make the meatballs: combine all of the meatball ingredients into a large mixing bowl and stir together. Then, shape the meat mixture into 1-inch-diameter meatballs, about 16. Place on a baking sheet and set aside.Start the soup: Bring the broth and garlic to a boil in a large pot or deep pan. Add the meatballs, lower the heat and simmer until cooked through, about 7-10 minutes.While the meatballs are cooking, slice your zucchinis lengthwise halfway and then spiralize them, using Blade D.Once the meatballs are about done, add in the zucchini noodles and let cook 2-3 minutes or until al dente. Then, whisk the eggs and cheese in a medium bowl to blend and season with salt and pepper. 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. Season the soup to taste with salt and pepper.Ladle the soup into bowls and serve. Finish soup with red pepper flakes and parsley.