Method
- Render the guanciale in olive oil over medium heat until crisp, then turn off the heat.
- Whisk the egg yolks, whole egg, pecorino, and black pepper into a thick paste in a bowl.
- Boil the spaghetti in salted water until al dente, reserving 1 cup of the starchy cooking water.
- Toss the pasta with the guanciale, then off heat stir in the egg mixture and pasta water until silky.
Cooks notes. Recipes are tested in a US home kitchen. Substitute lemon for lime if you must, but the result will read brighter. Salt to taste -- our quantities skew toward kosher.