Buttered Egg Noodles with Parsley
Bring a large pot of water to the boil and salt generously. Add the noodles and cook until they are tender but not mushy.
Meanwhile, ladle 1/4 cup of the noodle cooking water into a medium skillet. Set the skillet over low heat and, while whisking constantly, gradually add the butter, piece by piece, (let each piece of butter melt into the sauce before adding the next bit) until a smooth sauce has formed. Stir in the parsley and salt and pepper, to taste. Add the lemon zest, if desired.