Method
- Render pancetta or guanciale gently.
- Add onion and cook until translucent.
- Add tomatoes and simmer 25 minutes.
- Cook fusilli until al dente.
- Toss with sauce and pasta water.
- Serve with pecorino and parsley.
Cook's note: If using handmade fusilli, cook gently; they can be more fragile than factory pasta.