Method
- Render guanciale slowly until lightly crisp.
- Add onion and cook until soft.
- Add tomatoes and marjoram; simmer 15 to 20 minutes.
- Cook pasta until al dente.
- Toss with sauce and pasta water.
- Finish with pecorino and pepper.
Cook's note: Marjoram gives the sauce its Umbrian character; oregano changes the profile.