Bring a large pot of salted water to a boil and cook spaghetti until al dente.· 10m
Render the guanciale in a cold pan over medium heat until golden and crisp.· 8m
Whisk yolks, whole egg, Pecorino, and pepper into a thick paste.
Reserve a cup of pasta water, drain spaghetti, toss into the guanciale pan off heat.
Pour egg mixture over hot pasta, toss vigorously, loosen with pasta water until silky.
Plate, finish with extra Pecorino and pepper, serve immediately.