In a large sauce pan, add your pasta and cover with water and salt generously. Cook til al dente over medium heat.
While you pasta is cooking. in a large skillet place the olive oil and shallots then set heat to medium heat.
Cook the shallots for one minute then add in your garlic. Be sure to toss and stirr the shallots and garlic to ensure they don't burn for an additional 2 minutes.
Add in to the skillet the tomato paste, calabrian chilis and cream cheese. Drop the heat to low and stir vigorously to remove all clumps.
Once smooth, add in your heavy cream and stir gently to combine. Taste test the sauce and add desired salt and pepper.
Once your pasta has cooked, strain the pasta and reserve ¼ cup of pasta water.
Add the reserved pasta water to your sauce and stir to combine.
Then add your cooked pasta and butter into the sauce and gently fold the pasta into the sauce to fully coat each noodle.
Garnish with fresh parsley and enjoy.