Meatball Sandwich 9 Steps
In a large bowl, add ground beef, breadcrumbs, egg, finely chopped parsley, grated Parmesan, minced garlic, salt, pepper, nutmeg and chili flakes (if using).
Use your hand and mix everything together until well combined but do not overwork the mixture.
Once all ingredients are combined, roll into eight even meatballs (around 70 grams each).
In a large saucepan, heat 1 tablespoon olive oil on medium high heat.
Add meatballs into the saucepan and cook them until browned and fairly cooked, about 5-7 minutes.
Add the marinara sauce to the saucepan and bring it to a simmer. Cover it with a lid and let it cook for 20-25 minutes.
In the meantime, toast your sandwich bread with butter or olive oil.
Once the meatballs are done, place them on your toasted bread and put two slices of provolone cheese on each sandwich. Broil for 1-2 minutes or until cheese melts.
Garnish with grated pecorino or Parmesan, fresh basil leaves and enjoy.