Bring a large pot of salted water to a boil over high heat.
Place a large non-stick pan over medium heat and add the diced pancetta, sauteing it until golden brown.
Once all of the pancetta is browned, add the vodka to the pan and cook it until it reduces by half, about 3 minutes.
Add the prepared marinara sauce to the pan, then whisk in the heavy cream. Reduce the heat to low and let the sauce simmer for 10 minutes.
While the sauce is simmering, add the pasta to the boiling water and cook it until al dente.
Drain the cooked pasta and add it to the pan with the sauce, tossing to coat.
Serve the pasta topped with Parmesan cheese.