Finely chop onion, carrot, and celery.
Heat olive oil in a pan and sauté the chopped vegetables.
Add ground beef and pork, and stir-fry.
Pour in red wine and cook off the alcohol.
Add tomato paste and chopped tomatoes.
Add bay leaf, salt, and pepper, then simmer over medium-low heat.
After boiling for 15-20 minutes, serve the finished sauce with pasta.