1 small onion, roughly chopped
1 medium carrot, roughly chopped
1 rib celery, roughly chopped
1 clove garlic, chopped
1 tablespoon olive oil
Kosher salt and freshly ground black pepper
3 pounds beef short ribs
1 tablespoon tomato paste
One 28-ounce can crushed tomatoes
2 cups dry red wine
2 sprigs fresh rosemary, stripped
16 ounces linguine
2 tablespoons roughly chopped fresh flat-leaf parsley
Grated Parmesan, for serving