1/2cupparmesanpreferably freshly shredded (see notes)
1teaspoonkosher salt
Instructions
Bring a large pot of well-salted water to a rolling boil. Cook the pasta according to the package directions. Drain.
Meanwhile, heat a large skillet over medium heat. Sauté the sausage until cooked through and lightly browned, 7 to 8 minutes. Remove to a plate, cover, and set aside.
Melt the butter in the pan. Add the onion and sauté until softened and starting to brown, 4 to 5 minutes. Add the garlic and sauté another 30 seconds.
Add the tomato paste and red pepper flakes. Cook for 1 minute, stirring often.
Add the half and half, parmesan, and salt, and stir until everything is well combined. Simmer gently for 1 to 2 minutes until the sauce has thickened slightly.
Toss the drained pasta and sausage with the sauce until everything is well coated. Top with more parmesan and red pepper flakes (optional). Serve warm.
Notes
I used freshly grated Parmigiano Reggiano. While any parmesan will work in this recipe, freshly grated will produce the best results.
Half and half is simply equal parts whole milk and heavy cream. If you need to make your own for this recipe, I suggest 2/3 cup whole milk mixed with 2/3 cup of heavy cream.
Store the pasta in an airtight container in the fridge for up to 5 days.