Preheat oven to 375°F.
In a large bowl, whisk the egg. Add the onion, garlic, parsley, parmesan, oats, salt, pepper, oregano, and chili (if using) and mix well. Add the turkey meat and fold together with the other ingredients.
Line a large baking sheet with parchment paper. Using your hands, roll the turkey mixture into balls (about 25 in total, but you can make them bigger or smaller according to your preferences), and place on the baking sheet, slightly spaced apart.
Place in the oven and bake for 15-20 minutes, until fully cooked through.
While the meatballs are cooking, put the pasta water on to boil, and make the sauce by combing the ingredients in a small pot over low-medium heat. Cover, and let simmer.
Cook the pasta in generously salted water until al dente. Drain and return to the pot, drizzle with olive oil, and set aside, covered, until ready to serve.
Turn the oven on to broil and let the meatballs brown on top for 5-7 minutes until golden. Remove from oven.
To serve, portion out the pasta into each bowl, cover with sauce, then add 4-6 meatballs per person. Drizzle with more olive oil, crack some black pepper over top, and grate more parmesan, if desired. Serve hot. Say thank you and enjoy.