In a large bowl, combine the ground turkey, breadcrumbs, Parmesan cheese, egg, minced garlic, Italian seasoning, salt, and black pepper. Mix until well combined.
Form the mixture into meatballs, about 1 inch in diameter. You should get around 16 meatballs.
In a large skillet, heat the olive oil over medium heat. Add the meatballs and cook for about 8-10 minutes, turning occasionally, until browned and cooked through.
Remove the meatballs from the skillet and set aside. In the same skillet, melt the butter over medium heat.
Add the spiralized zucchini to the skillet and sauté for 2-3 minutes until just tender.
Return the meatballs to the skillet, add the chopped parsley, and toss everything together. If desired, sprinkle with red pepper flakes for a little heat.
Serve immediately, garnished with additional parsley if desired.