* hot cooked pasta, such as fresh egg noodles, fettucini, tagliarini, or hot or cold tortellini, ravioli or gnocchi.
Melt butter with cream, tomatoes, and the half teaspoon nutmeg in a wide frying pan. Stir in the cooked pasta and bring quickly to boiling; stir gently from time to time. Let boil rapidly 1 to 2 minutes, then blend a little of the hot sauce with the egg yolk. Remove pan from heat and stir in egg yolk mixture and the 0.75 cup Parmesan cheese, blending thoroughly. Serve at once, offering additional nutmeg and Parmesan cheese.