Combine the ground meat, bread crumbs, egg, parsley, minced garlic and salt and pepper in mixing bowl. Mix well with a fork and form into tiny meat balls with your hands. Place meatballs on a greased baking sheet and bake for about 25 minutes at 350 degrees F, until brown.
About ten minutes before serving, bring the chicken broth to a boil, add the spinach, orzo, and meatballs and return soup to a simmer. Stir in the Pecorino cheese and serve.
Alternate: You can saute the meatballs in olive oil until brown, or bring your chicken stock to a low boil, add the uncooked meatballs, simmer for about 25 minutes, add the spinach, cook until tender, stir in the cheese and serve.