Remove the husks and threads from the sweetcorn, then brush the kernels all over with the oil, seasoning them liberally with salt and pepper as you go.
Place the corns on the grill over hot coals and watch them carefully, turning them around with tongs so that all the kernels get toasted to a golden-brown colour. The whole process will take about 5-10 minutes, depending on how far the corn is from the heat – test each one with a skewer to check that it is tender. To serve, take your sharpest knife and cut the corns across into chunks.
These are best eaten using your hands and just taking bites: delicious!