Pasta Sauce

Ingredients

• 1 can San Marzano tomatoes
• onion or garlic
• olive oil
• oregano or basil

Method

Heat olive oil in a heavy-bottomed saucepan over a medium flame. The oil should shimmer but not smoke — you're building a base, not searing. Add either diced onion or sliced garlic (not both; they have different release rates for their aromatics). If using onion, cook for 4–5 minutes until the edges turn translucent and the raw bite softens. If using garlic, watch it closely — 2–3 minutes maximum before it catches and turns bitter. The aim is to release the sulphur compounds that form the aromatic-vegetables foundation of the sauce, not to caramelise.

Tip the entire contents of the San Marzano tin directly into the pan, liquids included. That starchy, acidic liquid is part of the sauce structure — discard it and you lose body. Bring to a bare simmer and let it settle for 30 seconds, then begin breaking down the tomatoes with the back of a wooden spoon or a potato masher. Work methodically; you're not pulverising, you're creating a texture that sits between chunky and smooth. This rough crush matters because it increases surface area for the acid to work on the remaining solids whilst keeping enough structure so the sauce doesn't collapse into paste. Simmering temperature is critical here — a rolling boil will evaporate your liquid too fast and concentrate the acidity into harshness.

Keep the heat low. After 15 minutes you should smell the raw edge drop away. At 20–25 minutes, the sauce will darken slightly and any harsh acidity will have mellowed; taste it now. The surface should move slowly, with occasional bubbles breaking through. Stir occasionally to prevent sticking on the base. Once the sauce has lost its raw tomato twang and the colour has deepened from bright red toward rust, add your herb of choice — oregano if you want a classical dried-herb profile, fresh basil only at the very end if you want its volatile oils intact. Oregano takes a final 2 minutes of heat; basil should not see the pan again, only the finished dish. A pinch of salt draws out remaining liquid; a crack of black pepper sharpens the acidity. The sauce is ready when it clings lightly to the back of a spoon and falls away in sheets rather than running.