Bring a large pot of water to a boil. Season it generously with salt. Cook until pasta is al dente.
Put the butter on a large plate or bowl (recommend it being warm). Use tongs to remove the pasta from the water directly to the bowl with the butter along with about 1/4 cup pasta water.
Add half of the parmigiano & toss the pasta well to melt the butter and coat the pasta in the sauce. Add the remaining cheese along with another 1/4 or so cup of pasta water if needed. Season with a pinch of salt if needed. Serve immediately topped with additional cheese!
