Slowly add the porcini water and then the tomato sauce to the mushroom mixture, stirring. Add the cream and stir well. Drain the pasta, add to the sauce, and mix well. Sprinkle with the Parmigiano ...
Pasta, heavy cream, mushrooms, garlic, butter, Parmesan cheese, salt, and pepper to taste. Heat butter in a pan. Sauté garlic until fragrant, then add sliced mushrooms. Cook until soft and golden.