1: Boil slightly salted water and cook the pasta when boiling.
2: Chop the onion and sauté it in a pan with 2-3 tablespoons of olive oil and diced prosciutto.
3: Sauté for a few minutes, then add the tomato passata while keeping the heat high.
4: Cook for about 5 minutes, then add salt, lower the heat, and let the tomato sauce cook for another 5 minutes.
5: Add the cream and mix well with a spoon to uniform the sauce.
6: Drain the pasta al dente and add it directly to the pan with the sauce.
7: Toss the penne in the sauce for a few minutes, then turn off the heat.
8: Adjust with salt, sprinkle with chopped fresh parsley, and serve hot.