Penne with Squash, Leeks & Parmesan Cheese

One-pot pasta is one of weeknight cooking’s quietest revolutions, and this Italian version turns a single pot of salted water into a full meal. Penne boils while cubes of winter squash drop in three minutes before the pasta is done, finishing just tender. Sliced leeks join for the last full minute, wilting into soft green ribbons without losing their oniony sweetness.

The seasoning is deceptively simple. A tablespoon of olive oil, a generous quarter cup of grated Parmigiano-Reggiano, and a half teaspoon of freshly grated nutmeg. Nutmeg is the quiet genius here, an unexpected partner to squash that shows up in Italian cooking from tortellini di zucca to creamed spinach.

A splash of reserved pasta water loosens everything into a silky coating, the kind that clings to every penne tube without drowning the dish. Pass extra parmesan at the table.

Chef Tips

• Cube the squash small, about ½ inch, so it cooks through in just 3 minutes. Larger cubes stay raw or turn the pasta to mush.
• Wash leeks well. Slice first, then swish in cold water to release sand hiding between the layers.
• Reserve pasta water before draining. Forgotten reserved water means dry, gloppy pasta.
• Grate the nutmeg fresh. Pre-ground nutmeg is stale and loses the aromatic quality that makes this dish work.
• Add cheese off the heat. Cheese thrown into too-hot pasta seizes into clumps instead of coating.

Variations

• Swap winter squash for cubed zucchini or yellow squash in summer, adjusting cook time to 1 to 2 minutes.
• Add crumbled cooked Italian sausage or pancetta for a meaty version.
• Finish with a handful of fresh sage or thyme leaves for another herb dimension.