• Freshly ground black pepper to taste
Cook the pasta according to package directions using a good amount of kosher salt in the water. Remove 1 cup of the pasta cooking water and set aside. Drain the pasta.
Meanwhile, in a large skillet, heat together the olive oil and butter over medium heat. Add the red pepper flakes and cook 1 minute. Add the garlic and shallots and sauté about 30 seconds or until just fragrant. Stir in the vodka and cook about 3 minutes or until the vodka reduces. Stir in the tomatoes and continue cooking about 5 minutes.
Reduce heat to low and stir in the heavy cream. Simmer about 5 minutes, then stir in the Parmesan cheese and parsley. Season to taste with salt and pepper.
Add the cooked pasta to the sauce, tossing to combine. If the sauce seems too thick, add in some of the reserved pasta cooking water.