Combine cream, butter, salt, nutmeg ... thickened. Whisk in Parmesan and fresh herbs and simmer for another 5 minutes. Serve immediately over hot pasta.
Preheat oven to 350 degrees. ... Spoon mixture into pasta shells. (Can be prepared 3 ... oven. Stir in herb mixture. Arrange pasta shells in ... 20 minutes. Serve hot.