Cook the spaghetti according to package directions until al dente.
While the noodles are cooking, brown the butter in a saucepan over medium heat. The butter will turn a yellow, start to froth and then become brown.
Drain the pasta but do not rinse. Pour the brown butter over the pasta. Sprinkle with mazithra cheese and toss to coat. Serve with a salad and garlic bread and garnish with parsley if desired.