In a large Dutch oven, heat the oil, 2 turns of the pan, over medium-high heat. Add the sausage, breaking it up into chunks, then add the beef and cook, breaking up both meats into crumbles as they brown. Add the garlic, onion, marjoram and red pepper flakes (if using) and season with salt and black pepper. Cook to soften the onions, 8-10 minutes. Add the stock and passata. Hand-crush the canned tomatoes as you add them to the pan, then add the juices from the cans. Bring to a bubble, reduce the heat to a low simmer. Add the basil and simmer for 30 minutes.
Bring a large pot of water to a boil for the pasta. Salt the water and cook the pasta about 3 minutes shy of al dente. Before draining, ladle out about 1/2 cup of the starchy pasta cooking water before draining the pasta.
Preheat the oven to 375°F. In a large bowl, combine the ricotta and 1/2 cup of the Parm. Stir in the egg, the reserved starchy water, the drained pasta and half the sauce. Transfer the pasta to a large baking dish (at least 9×13 inches) and top with the remaining sauce.
Cover the pasta and sauce evenly with the grated mozzarella and the remaining 1/2 cup Parm. Top with the parsley and bake until browned and bubbling on top and hot through, about 30 minutes.
Courtesy of Rachael Ray’s new cookbook, Everyone Is Italian on Sunday.