Method
- Render guanciale until golden; remove some crisp pieces for garnish.
- Add chili if using, then tomatoes.
- Simmer until the sauce thickens and tastes rounded.
- Cook pasta al dente.
- Toss pasta in sauce with pasta water.
- Finish with Pecorino and reserved guanciale.
Cook's note: Onion and garlic are household choices, not necessary. The clean version lets guanciale speak.