Boil water and cook the pasta per package instructions.
In a large pot, cook the olive oil, onion, and garlic for 3-5 minutes over medium-high heat until the onion becomes translucent.
Add the vodka and red pepper flakes, and cook for 3-4 minutes until the volume decreases to one half.
Add the tomatoes, salt, and pepper, and cook for 10-15 minutes, stirring and breaking the tomatoes with the spoon, until the mixture thickens.
Decrease the heat to low, and add the heavy cream. Cook for 1-2 minutes, stirring continuously, until well mixed.
Remove from heat and add pasta and parmigiano reggiano. Top with oregano to serve.