In a medium bowl, combine cilantro, 4 tablespoons olive oil, lime juice, garlic, cumin and salt.
In a gallon size Ziploc bag or large bowl, combine chicken and cilantro mixture; marinate for at least 1 hour to overnight, turning the bag occasionally. Drain the chicken from the marinade.
Heat remaining 1 tablespoon olive oil in a cast pan over medium high heat. Working in batches, add chicken to the pan in a single layer and cook until golden brown and cooked through, about 4-5 minutes per side.
Serve immediately garnished with additional chopped cilantro and fresh lime juice!