01 - Pat the chicken breasts dry with paper towels. Season both sides generously with salt, pepper, cumin, and oregano, pressing the spices into the meat to adhere.
02 - Heat olive oil in a large skillet over medium-high heat until shimmering. Add chicken breasts and sear for 2–3 minutes per side until golden brown. Remove chicken from skillet and set aside on a plate.
03 - In the same skillet, add sliced onion and cook for 2–3 minutes until softened and translucent. Add garlic and jalapeño (if using), sautéing for 1 minute until fragrant.
04 - Pour in the salsa verde and lime juice, stirring to combine and scrape up any browned bits from the bottom of the skillet. Bring the mixture to a gentle simmer.
05 - Return chicken breasts to the skillet, nestling them into the sauce. Reduce heat to medium-low, cover, and simmer for 15–18 minutes until chicken is cooked through (internal temperature reaches 165°F).
06 - Remove skillet from heat and let chicken rest in the sauce for 2–3 minutes. Transfer chicken to serving plates, spoon sauce generously over top, and garnish with cilantro, queso fresco, and lime wedges.