The key to the success of this recipe is the tossing of the hot pasta with the half and half and the parmesan. When you've got everything together, use a pair of tongs and toss, toss, toss the pasta.  At first, it won't seem like much is happening, but after a minute or two, a glossy, delicious sauce is formed.  It really is super easy, and you'll find yourself wanting to coat your pasta like this all of the time.  To make it a little bit richer, you can always add in a pat or two of butter, too.  Not necessary, but delicious!