Bring a large pot of water to a rolling boil. Add the pasta and cook until al dente.
Meanwhile, in a large bowl, combine 1½ cups of pecorino romano and 1 tsp freshly ground black pepper, and ⅓ cup pasta cooking water. Mix together to form a paste.
Once pasta is al dente, reserve a bit of the pasta water before pouring into a large strainer to drain. Add the strained pasta to the bowl with the parmesan mixture and toss vigorously.
Adjust based on taste. Add additional Tbsps of hot water to loosen the sauce as needed and melt the cheese.
Serve topped with a sprinkle of pecorino romano and pepper to taste. Serve immediately.