Combine first 3 ingredients and 1 teaspoon salt in a zip-top plastic freezer bag or large shallow dish, and add chicken. Seal or cover, and chill 2 hours, turning occasionally.
Remove chicken from marinade, discarding marinade.
Sprinkle evenly with pepper and remaining 1 teaspoon salt.
Heat a large ungreased cast-iron skillet or grill skillet over medium-high heat until hot. Cook chicken, in batches, in hot skillet 3 to 4 minutes per side or until browned.