Cook pasta as directed. In the meantime, finely dice the bacon. Cut the leek into fine rings. Finely chop the garlic. Heat the butter in a saucepan and leave the bacon in it. Then add the leek and garlic and cook for 2 minutes. Mix egg yolks and cream. Turn the hot pasta in the bacon mixture and fold in the egg cream. Immediately remove the pot from the stove. Season the pasta with pepper and serve sprinkled with parmesan.