Meanwhile, heat 2 Tbsp. oil in a large skillet over medium heat. Season chicken with 1/2 tsp. each salt and pepper. Add the chicken to the skillet; cover and cook for 8 minutes. Flip and continue to cook, covered, until the chicken is golden brown and an instant-read thermometer inserted in the center registers 165 degrees F, 8 to 10 minutes more. Transfer the chicken to a plate. When cool enough to handle, cut into 1-inch pieces.