Over medium heat Sweat the onion in butter until soft and translucent, about 5 minutes. Season with a healthy pinch of salt
Add the Calabrian chili and garlic and cook another 3 minutes
Boiling the pasta in well seasoned water until til al dente, drain and reserve 1 cup of water
Tip in the tomato paste and cook for about 5 minutes being careful to not let it burn
Pour in the vodka and deglaze the pan by scraping any bits up from the bottom
Cook off the alcohol until almost dry about 1-2 minutes
Pour the reserved tomato and cream into the pan and simmer another 8 minutes or so
Tip into a blender and blend until til smooth (you can leave it slightly chunky if you prefer)
Return sauce to pan and adjust seasoning with salt
Add the reserved pasta back to the pan with a tablespoon of butter and 1/4 cup of grated Parmesan and 1/4 cup of water, stir or toss to combine adding pasta water to your desired consistency
Enjoy topped with more freshly grated Parmesan
