01 - Pat beef cheeks dry with paper towels and season generously with salt and pepper on all sides.
02 - Heat vegetable oil in a Dutch oven over medium-high heat. Sear the beef cheeks until deeply browned on all sides, approximately 3–4 minutes per side. Remove meat from pot and set aside.
03 - Add diced onion to the same pot and sauté for 5 minutes until translucent. Add minced garlic and cook for 1 minute until fragrant.
04 - Stir in chipotle peppers, tomato paste, cumin, smoked paprika, and oregano. Cook for 1–2 minutes, stirring constantly, until spices are fragrant and paste darkens slightly.
05 - Return seared beef cheeks to the pot. Pour in beef broth, lime juice, and add bay leaf. Bring mixture to a simmer, then cover tightly with lid and reduce heat to low.
06 - Braise covered for 3 to 3.5 hours, checking occasionally to ensure liquid maintains a gentle simmer. Meat is done when it yields easily to a fork and shreds without resistance.
07 - Transfer beef cheeks to a cutting board. Using two forks, shred the meat, discarding any large pieces of excess fat. Return shredded meat to the pot and toss with a few spoonfuls of braising liquid to moisten.
08 - Heat corn tortillas in a dry skillet over medium heat for 30 seconds per side until warm and pliable, or char briefly over an open gas flame. Keep warm wrapped in a clean kitchen towel.
09 - Fill warm tortillas with shredded beef. Top generously with finely diced white onion, chopped cilantro, and salsa. Serve immediately with lime wedges for squeezing.