Start by boiling salted water on a large pot.
As soon as the water is ready, follow the instructions in the package to cook the bucatini for pasta all'Amatriciana.
While the pasta is cooking, place a large pan over medium-high heat.
Add the chopped guanciale into the cold pan.
Cook the cured pork cheeek until the meat becomes brown; the fat should start looking transparent.
Add the chopped onion.
Cook until the onion turns soft.
Pour the white wine.
Leave uncovered and let the wine evaporate.
Add the tomatoes, salt, and peperoncino.
Mix, cover with a lid, and simmer for a few minutes until the juices come out of the tomatoes --- taste and adjust seasoning.
By this time, the pasta should be ready, so add it directly into the Amatriciana sauce.
Mix, take the pan off the heat, and transfer into serving plates.
Top your bucatini all'Amatriciana with freshly grated pecorino Romano, and enjoy!