Step 01
Slice the onions very thinly into half-moons. The thinner you slice them, the smoother the sauce will be.

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One of the oldest and simplest pasta dishes of Venetian and Veneto cuisine. Thinly sliced onions are slowly caramelised in olive oil to create a smooth sauce, then anchovy fillets are melted into the sauce. Thick bigoli pasta is tossed with this rich, sweet-and-salty sauce. It is traditionally served as a 'mangiare di magro' (fasting dish).
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per serving
Slice the onions very thinly into half-moons. The thinner you slice them, the smoother the sauce will be.
Heat the olive oil in a wide, thick-based pan over a low heat. Add the sliced onions and cook over a low heat for 30–35 minutes, stirring occasionally. The onions will become completely soft, turning from golden to a deep amber colour, and will take on a smooth consistency. Do not burn them — caramelise slowly.
Once the onions are completely soft and have reached a smooth sauce consistency, add the finely chopped anchovy fillets. Cook, stirring, for 2–3 minutes until the anchovies have melted into the sauce.
If using white wine, add it and cook, stirring, for 2 minutes until the alcohol has evaporated. The wine will give the sauce a glossy finish and a touch of acidity.
Meanwhile, bring a large pan of well-salted water to the boil. Cook the bigoli pasta according to the packet instructions until al dente (usually 8–10 minutes).
Drain the pasta (reserving some pasta water) and transfer it to the sauce pan. Cook over a low heat for 1 minutes, stirring, until the sauce evenly coats the pasta. Adjust the consistency with the reserved pasta water if needed.
Season with freshly ground black pepper and serve hot.
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