Reduce the heat to medium-high.
Add a few tablespoons of olive oil and then get the onions in to get them going.
Season with salt and once softened and beginning to turn translucent, add the peppers.
Cook for a few minutes until the onions are fully translucent and soft and start to brown slightly. You just want to cook them until they are soft enough to blend smoothly.
Add the garlic, and Calabrian chilis and cook until the garlic softens and begins to slightly brown around the edges.
Add two tablespoons of tomato paste and incorporate into the vegetables and cook for 2-3 minutes.
Turn the heat off and deglaze the with the vodka.
Slowly add the pint of cream, let cool slightly and then blend until smooth.