Heat the oven to 425 degrees F. Lightly oil a large, shallow baking dish. Bring a large pot of salted water to a boil.

In a large skillet, heat about 2 tablespoons olive oil over medium heat. Add the onion and saute until soft, about 5 minutes. Add the garlic and crumbled sausage and saute until the sausage starts to brown. Season with salt and pepper. If the sausage gives off a lot of fat, pour off most of it, but leave a little to add flavor to the sauce. Add the red wine and let it boil until it's almost gone. Add the tomatoes with all of their juices and cook, uncovered, at a lively simmer for about 10 minutes. The sauce will thicken slightly. Add the marjoram or oregano and taste for seasoning.

In a large bowl, mix the ricotta, about half of the grated pecorino, the nutmeg, and the parsley. Season with salt and pepper.

Meanwhile, cook the ziti until al dente. Drain well and toss it with the ricotta mixture until well coated. Add the sausage and sauce and mix again. Add the mozzarella and toss gently. Pour everything into the baking dish and sprinkle the remaining pecorino on top. Bake uncovered until lightly browned and bubbling, about 20 minutes. Serve right away.