Bring a large pot of water to a boil and add salt to the water.

Cook the pasta until al dente. (tender but still has a bite)

Drain the pasta (reserving some of the pasta water)

Place the pasta in a large, heated bowl

Add in the diced butter and grated cheese and start tossing the pasta until the butter and cheese have melted, add a little of the pasta water as necessary to keep the mixture loose.

Season with salt and pepper to taste

Serve immediately