3 classic ragu bolognese Recipes

extra-virgin olive oil, onions, finely chopped (about 1 1/2 cups), celery stalks, finely chopped (about 1 cup), carrots, peeled, finely chopped (about 3/4 cup), ground beef (85% lean), ground veal, sliced pancetta, finely chopped, dry red wine, beef stock or chicken stock, divided, tomato paste, kosher salt and freshly ground black pepper, whole milk, tagliatelle or fettuccine (preferably fresh egg), grated parmesan (for serving)

olive oil, butter, onions, chopped, garlic, minced, celery ribs, thinly sliced, carrot, finely chopped, lean ground beef, salt, dry red wine, milk, nutmeg, dried oregano, fresh ground pepper, italian tomatoes, roughly chopped ,with their juice