Need a long night's rest? Make this ragu for dinner. It will put you out like a light and make you feel profoundly satisfied.
Bring a large pot of water to a boil for the pasta.
In a Dutch oven or deep skillet, heat the oil, one turn of the pan, over medium-high. Add the butter. When it foams, add the beef, veal, and sausage. Cook, stirring occasionally and breaking up the meat with a spoon, until lightly browned, about 5 minutes. Season with salt, finely ground black pepper, and the white pepper. Add the carrot, shallot, sage, garlic, and nutmeg. Cover and reduce heat to medium. Cook, stirring often, until the vegetables soften, about 10 minutes.
Add the tomato paste. Increase heat to medium-high. Cook, stirring often, until fragrant, about 1 minute. Add the wine. Cook, stirring often, until reduced by half, about 4 minutes. Add the passata and stock. Reduce heat to medium. Cook the sauce at a low bubble until the pasta is ready.
Salt the boiling water and add the pasta. Cook until 1 to 2 minutes shy of the package directions. Scoop out 1/2 to 3/4 cup of the pasta cooking water, then drain the pasta. Mix the pasta and about 1 cup Parm into the sauce. Toss for 1 minute to coat the pasta; add cooking water as needed if the pasta is too dry.
Place the Burrata in a serving bowl. Top with the pasta, parsley, and more Parm. At the table, break open the Burrata and toss the pasta again to coat.