-In a medium bowl, add the lemon zest and juice, grated garlic, basil, parsley and red pepper flakes (if using). Mix well. Once pasta is cooked al dente, strain out the pasta water, reserving about 1-2 tablespoons of the cooking liquid, and add the pasta to the bowl. Grate some fresh Parmesano Reggiano on top of the warm pasta along with a bit of salt and fresh black pepper (being careful with the salt, since parm is quite salty), mix well to combine. If the mixture seems a bit too thick, add a bit of the cooking liquid to loosen and allow the cheese to melt. Serve with more pepper and fresh parm if needed and enjoy!