Bring a large pot of water to a rolling boil and salt it generously.
Add the pasta and cook as directed, or until 'al dente' to your taste.
Meanwhile, place the goat cheese in a large mixing bowl.
Stir in enough hot pasta water to thin the cheese into a creamy sauce.
Stir in the Parmigiano cheese, lemon juice and salt to taste.
When the pasta is cooked, use tongs or a spaghetti fork to transfer it into the sauce bowl.
Stir all together. If the sauce is too thick, you can thin it with a little more pasta water.
Serve immediately, topped with lemon zest.
