01 - Heat olive oil in a large skillet over medium heat. Add pancetta, onion, carrots, and celery. Sauté until softened, approximately 5 to 7 minutes.
02 - Incorporate minced garlic and cook for 1 minute until fragrant.
03 - Add ground beef (and pork if using) to skillet, breaking it apart with a spoon. Cook until no longer pink, about 5 minutes.
04 - Move the cooked mixture into the slow cooker insert.
05 - Add crushed tomatoes, tomato paste, red wine, broth, oregano, basil, bay leaf, crushed red pepper flakes, salt, and black pepper. Stir thoroughly to combine.
06 - Cover and cook on low for 6 to 8 hours or on high for 3 to 4 hours until sauce is thick and flavorful.
07 - Remove bay leaf and adjust seasoning with salt and pepper as needed. Serve hot over pasta garnished with fresh parsley or basil.