Finely chop the onion, carrot, celery, and garlic.
Heat olive oil in a pan and sauté the prepared vegetables.
Add ground beef and pork, and cook until the meat is browned.
Add tomato paste, diced tomatoes, and wine, then bring to a boil.
Season with bay leaf, salt, and pepper.
Cover with a lid and simmer on low heat for 1-2 hours.
Serve the ragu with pasta or rice.