Bring a large pot of water to a rolling boil and generously season with salt (should taste like the sea). Add pasta and begin to cook according to package
Meanwhile, add 1 1/2 cups of freshly grated pecorino, along with the black pepper, to a serving dish of your choice. Working quickly, being to ladle in about a cup of the boiling pasta water on top of the cheese/pepper. Use a whisk, or the back of a wooden spoon, to vigorously whisk together the boiling water and cheese to create a smooth creamy sauce. (if the sauce is too thick, add more cooking liquid, about a tablespoon at a time).
When the pasta is done cooking, reserve an extra cup of the cooking water before draining pasta.
Add cooked pasta to the serving dish and gently toss together with the creamy sauce and a cup of arugula
Top with additional pecorino and black pepper before serving.