Cook the pasta in boiling salted water for about 8 minutes until al dente. In the meantime, wash, clean and drain the mushrooms. Heat the oil in a pan and fry the mushrooms. Deglaze with stock and cream. Season to taste with salt, pepper and lemon juice. Grate the Parmesan cheese with the fine side of the kitchen grater.
Stir into the sauce and thicken slightly. Wash the parsley, dab dry and cut into fine strips, except for a little to garnish. Cut ham into fine bite-sized strips. Arrange noodles on a plate, pour sauce over them and sprinkle with ham and parsley. Garnish with lemon wedge, remaining parsley and parmesan slices as desired