01 - Season chicken breasts or thighs evenly with salt and black pepper on both sides.
02 - Heat olive oil in a large skillet over medium-high heat. Add chicken and sear for 2-3 minutes per side until golden brown. Remove from skillet and set aside.
03 - In the same skillet, add diced white onion and jalapeño. Sauté for 2 minutes until softened. Add minced garlic and cook for 30 seconds until fragrant.
04 - Stir in salsa verde, ground cumin, dried oregano, and fresh lime juice. Bring mixture to a gentle simmer.
05 - Return seared chicken to the skillet. Reduce heat to low, cover, and simmer for 15-18 minutes until chicken is cooked through and tender.
06 - Remove chicken from skillet and shred using two forks. Return shredded chicken to the sauce, stir well to coat, and simmer for 2 additional minutes.
07 - Serve chicken in warm corn tortillas. Top with fresh cilantro, diced red onion, avocado slices, and a squeeze of fresh lime.