You start, as so often, with a soffritto of onion and/or garlic sautéed in olive oil. Then you add best quality canned tomatoes, crushed in your hands, and allow them to simmer.

Meanwhile, blanch your trimmed green beans in abundant, well-salted water until crisp-tender, drain and add them to the tomato sauce along with some of their cooking water and allow them to simmer in the sauce until quite tender.