Bring large pot of water to boil, and salt it. In a separate pot, cook peas in boiling salted water, until just tender, about 3 min. Drain, rinse in cold water, drain again and set aside.
Cook the pasta in the large pot. While it is cooking, mix ricotta, butter and 1/2 cup Parmesan in a warmed bowl. When pasta is done drain and save 1 cup of water. Add as much of the water to the ricotta mixture as required to make a sauce.
Toss the pasta with the ricotta mixture and peas. Sprinkle with salt and black pepper, add more cooking water if necessar, and serve. Pass remaining Parmesan at the table.
Serves: 4 Total cook time: 20 min.
Source: NYT cooking app