Brush or rub each cob with some olive oil and sprinkle with salt and pepper. Place the corn on the hot grill and char each side, 2-3 minutes per side. You want the corn to get great char marks! Once the corn has charred, set aside until cool enough to handle. Once the corn has cooled, stand each ear up, stalk end down, in a wide, shallow bowl and , using your knife, slice the corn kernels off the cob. If using frozen corn, grill on a pan or roast in the oven.