Cut all ingredients as described in the ingredients list.
Fry the guanciale bacon over high heat until crispy.
Remove the bacon from the pan and set it aside; it will be added back later.
Reduce the heat slightly and sauté the red chili pepper, white onion, and garlic for about 2 minutes.
Then deglaze the pan with the white wine and bring it to a boil.
Add the tomato passata and bring it gently to a simmer.
Let it simmer gently for 30 minutes. Optionally, add a little (pasta) water occasionally if the sauce thickens too much. (Make sure to stir the sauce frequently as tomato sauce tends to burn quickly!)
Once the sauce has simmered long enough, prepare a pot of salted water for cooking the tagliatelle. (Make sure the water is salty enough so the pasta can absorb sufficient salt)
Cook the pasta (al dente) and add the remaining guanciale bacon to the sauce, let it simmer together for a few more minutes.
Add the pasta to the sauce and let it simmer together for another minute.
It's time for the finale. Remove the pasta from the heat and add half of the pecorino cheese to the pasta. Mix well and let the flavors meld together into a cohesive dish. Season with pepper and salt to taste.
Present the pasta on a plate, drizzle it (if desired) with some delicious olive oil, and sprinkle the remaining pecorino cheese on top. A dish to savor and enjoy.