Heat a large frying pan over medium-high heat. Add a small drizzle of olive oil if needed.
Place the chicken strips in the pan in a single layer. Cook in batches if necessary to avoid overcrowding.
Cook for approximately 3–5 minutes on the first side, depending on the thickness of the strips.
Turn the chicken and brush the cooked side with some of the chimichurri sauce.
Continue cooking for another 3–5 minutes, turning and basting both sides with the sauce until the chicken is golden and cooked through.
Check that the thickest pieces reach an internal temperature of 75°C.
Remove the chicken from the pan and brush with the reserved fresh chimichurri sauce before serving. Keep this reserved sauce separate from anything that has touched raw chicken.