Start by putting the chicken breasts between two pieces of plastic wrap or wax paper. Use a meat mallet or a rolling pin to pound them until they’re all the same thickness.
Place the chicken in a large freezer bag.
In a small bowl, mix together olive oil, lime juice, brown sugar, chopped cilantro, minced garlic, cumin, paprika, salt, and pepper.
Pour the marinade into the bag with the chicken. Seal the bag and massage the marinade into the chicken so it’s fully coated. Refrigerate for at least 30 minutes (or up to 4 hours).
Preheat your grill pan to medium heat. Make sure to oil the grill pan really well, so the chicken doesn’t stick.
Put the chicken on the grill and cook for about 7 minutes on one side. Flip it and cook for another 6-7 minutes, or until the inside temperature is 165°F.
Serve on top of rice with your favorite toppings. Enjoy!