Jacket Potato Wedges with Melting Cheese and Spring Onion

First rub each potato with olive oil and sprinkle generously with salt.

Bake them on a high shelf in the oven for an hour.  Then preheat the grill, cut each potato into quarters and place them in a grill pan lined with foil. Scatter the spring onions over the potatoes, then sprinkle on the grated cheese. 

Place under the grill until the cheese has browned and is bubbling.