01 - Heat olive oil in a large, heavy-bottomed pot over medium heat. Add onion, carrot, and celery. Cook for 6 to 8 minutes until softened and translucent.
02 - Stir in minced garlic and cook for 1 minute until fragrant.
03 - Add ground beef, breaking it apart with a wooden spoon. Cook for 8 to 10 minutes until browned and no longer pink.
04 - Pour in the red wine, scraping up browned bits from the pot. Simmer for 2 to 3 minutes until slightly reduced.
05 - Incorporate tomato paste, crushed tomatoes, oregano, bay leaf, salt, pepper, and nutmeg if desired.
06 - Reduce heat to low and partially cover. Simmer gently for 1 hour and 30 minutes, stirring occasionally.
07 - Stir in whole milk and continue to simmer uncovered for 20 minutes. Adjust seasoning to taste.
08 - Remove bay leaf. Serve sauce hot over cooked pasta and garnish with freshly grated Parmesan cheese.