ABOUT THIS RECIPERavioli filling without the pasta
Gnudi are soft Italian ricotta dumplings, often made with spinach. The name is usually explained as meaning ‘naked’: they resemble ravioli filling, but without the pasta wrapped around it. The exact ingredients vary from recipe to recipe. Here, spinach and ricotta make the familiar combination; Parmesan adds savory depth, and a little flour helps hold the dumplings together. They should be soft, not firm or doughy.
Fresh spinach wilts quickly in the pan, but retains a lot of moisture after cooking. So squeeze the cooled spinach thoroughly, using a clean tea towel if needed. Spinach that is too wet makes the mixture loose and calls for extra flour, which can make the gnudi heavier. Use ricotta that isn't watery, too. If it's very moist, let it drain in a fine-mesh sieve beforehand. Spinach is available all year round; baby leaves are often tender, while larger leaves sometimes take a little longer to wilt.
Mix the filling gently and add no more flour than necessary. The mixture will remain soft and a little sticky; that's normal. With lightly floured hands, shape it into dumplings. Chilling them briefly makes them easier to handle, but the most important thing is the poaching technique: keep the water at a gentle simmer, not a rolling boil. Vigorous movement can damage the delicate gnudi. Cook them in batches and lift them out with a slotted spoon as soon as they float to the surface.
Brown the butter over medium heat until the milk solids are golden brown and smell nutty. Stay nearby, because it can go from golden brown to burnt quickly. Lemon zest adds freshness without thinning the butter; a little lemon juice in the salad also gives a pleasant, sharp contrast. Gently toss the gnudi in the butter so they stay intact. A pinch of nutmeg in the filling goes well with spinach, but keep the amount modest.
Serve the gnudi right away with extra Parmesan and a simple green salad. Arugula adds a slightly peppery contrast; other salad leaves work too. Dress the salad just before eating so the leaves stay fresh. For a vegetarian preparation, it's worth choosing Parmesan made with vegetarian rennet if that matters to you. The dumplings are best freshly made, while their centers are still soft and the butter is just glistening around the outside.