Method
- Toast breadcrumbs in olive oil until golden; set aside.
- Warm garlic, anchovy, and chili in more oil until anchovy dissolves.
- Cook spaghetti until al dente.
- Toss pasta with anchovy oil and pasta water.
- Add parsley and lemon zest if using.
- Top generously with toasted crumbs.
Cook's note: Keep crumbs separate until serving so they stay crisp.