The Best Bolognese Sauce

olive oil, divded

ground beef

ground pork

Kosher salt and freshly ground pepper,

pancetta or bacon, sliced

yellow onion, finely diced

carrots, peeled and finely diced

celery stalk, finely diced

garlic cloves, minced

tomato paste

dry red wine

milk

whole tomatoes, passed through a food mill*

bay leaves

bunch fresh thyme, tied together with kitchen string

Parmigiano-Reggiano cheese rind

fresh pasta, such as fettuccine, tagliatelle, or pappardelle, cooked until al dente and drained

Grated Parmigiano-Reggiano cheese for serving