Prep Beef: Season chuck roast generously with salt and pepper.
Optional Sear: Heat olive oil in a skillet and sear beef on all sides until browned. Transfer to crockpot.
Sauté Veggies (optional for flavor): In the same pan, sauté onion, carrots, celery, and garlic for 3–4 minutes until softened. Transfer to crockpot.
Add Liquids u0026 Seasoning: Stir in crushed tomatoes, tomato paste, red wine, beef broth, oregano, thyme, basil, bay leaves, and red pepper flakes.
Slow Cook: Low: 8–10 hours,High: 5–6 hours
Shred Beef: Remove beef, shred with forks, and return to sauce. Discard bay leaves.
Combine u0026 Serve: Toss with pasta or spoon over polenta/mashed potatoes. Top with Parmesan and parsley.