Culinary secret: A great dish, even a great pasta, doesn’t have to involve a lot of actual cooking. In this one, the heat of the pasta does most of the work, wilting the spinach, melting the cheese, warming the peas, and bringing all the flavors together beautifully. It’s an easy weeknight supper that could also double as an elegant little dish to serve to friends. Use the baby spinach that comes prewashed in bags or boxes—no stemming
necessary.
