Step 1

In a large heavy pot, combine the oil with onion, garlic, carrots and celery. Stir and cook over medium heat until the vegetables are tender, about 5 minutes. Add the turkey and stir 1 minute. Add the marinara sauce, stir well, and add kosher salt and black pepper to taste. Reduce to simmer and allow sauce to simmer, covered, for 15 minutes.

Step 2

While the sauce is simmering, cook the spaghetti in a large pot of boiling salted water until al dente, according to package instructions. Reserve 1 cup of the cooking liquid, and drain the rest. Add the hot pasta to the sauce and toss to coat, adding enough reserved cooking liquid to thin out sauce as needed. Toss in freshly chopped parsley. Serve with desired amount of freshly grated Parmesan as garnish.