1.  Prepare the water for the spaghetti according to the manufacturer's instructions.

2.  While waiting for the water for the pasta to boil, prepare the Pesto Sauce.

 

 

 

3.   Cook the pasta according to the manufacturer's instructions. When the pasta has finished cooking, drain off most of the cooking water, leaving approximately 1 cup of cooking water in reserve.

4.  Place the drained pasta onto a serving dish, pour the pesto sauce over the pasta and toss thoroughly to coat all of the pasta in the sauce. If the sauce is too thick, add a bit of the reserved cooking water to the dish and toss well. Top with additional grated pecorino romano and serve.

Notes

Parmigiano Reggiano cheese can be substituted for the pecorino in this dish.