01 -
In a large oven-safe Dutch oven, cook diced pancetta or bacon over medium heat until browned and fat is rendered. Remove with a slotted spoon and set aside. Reserve rendered fat in the pan.
02 -
Pat beef dry and season generously with salt and pepper. Increase heat to medium-high and sear beef pieces in the reserved fat until browned on all sides, about 4–6 minutes per side. Transfer browned beef to a plate.
03 -
Add onion, carrot, and celery to the Dutch oven. Sauté over medium heat until vegetables are softened and beginning to caramelize, about 7–10 minutes.
04 -
Stir in chopped garlic and red pepper flakes. Cook for 1 minute, until fragrant.
05 -
Add beef broth, crushed tomatoes, thyme, rosemary, Italian seasoning, bay leaves, and the cooked pancetta or bacon. Stir to incorporate and scrape up any browned bits from the pan bottom.
06 -
Return the seared beef to the pot, nestling pieces in the sauce. Bring mixture to a gentle boil, then reduce heat to low, cover, and simmer for 2–4 hours, or transfer covered pot to a preheated oven at 140°C and cook until beef is fork-tender and falling apart, approximately 2–4 hours. Alternatively, transfer everything to a slow cooker and cook on LOW for 8–10 hours or HIGH for 4–6 hours.
07 -
Season the braising liquid with additional salt and pepper as needed. Remove bay leaves. Shred beef into large pieces, return to sauce, and serve hot.