SEAR: Heat a large skillet over medium-high heat. When the pan is hot, swirl in enough oil to coat the bottom. Arrange the chicken pieces in the pan so they are evenly spaced. They should sizzle the moment they touch the hot oil. (If there is not enough room in the pan for all the pieces, cook them in batches, wiping the pan clean and starting with fresh oil as needed.) Brown the chicken on the first side, about 3 minutes, then flip, reduce the heat slightly, and brown on the other side; the chicken will not be cooked through at this point. If you have cooked the chicken in batches, return all of the pieces to the pan.