Heat the grill to 350ºF- 420ºF until it is piping hot.
Wash the beans and cut the tops and the tails off.
Drizzle the olive oil onto the grill and pop the green beans onto the grill. Turn the beans every few minutes cooking for 8 - 10 until they are charred, but still beautifully crunchy.
Remove from the grill and sprinkle on the salt and pepper.