
In a large pot or Dutch oven, heat olive oil over medium heat. Add the ground beef and pork and cook, breaking it up with a spoon, until browned. Drain off any excess fat.
Add the chopped onion, celery, and carrot to the pot. Cook until softened, about 5-7 minutes.
Stir in the minced garlic, tomato paste, dried oregano, dried basil, salt, and black pepper. Cook for 1 minute more.
Pour in the red wine and cook, scraping up any browned bits from the bottom of the pot, until the wine has reduced slightly, about 5 minutes.
Add the crushed tomatoes and beef broth to the pot. Bring to a simmer, then reduce heat to low, cover, and cook for at least 2 hours, or up to 4 hours, stirring occasionally.
Stir in the milk or cream (optional) during the last 30 minutes of cooking. Taste and adjust seasonings as needed.
Serve the Bolognese sauce over your favorite cooked pasta. Garnish with grated Parmesan cheese and fresh parsley, if desired.
Excellent recipe! I used it in a baked ziti and it was amazing. The sauce had a great flavor and the family loved it. Would make it again.