This is a dish I borrowed (ok pinched) from a M & S dish. Cut potatoes into cubes and put into a pan. Cover with salted water and bring to the boil. Don't cook for too long, about 5 mins is enough, Meanwhile, put a roasting tin in the oven with olive oil in it - the oil must be hot. When the potatoes are half cooked, drain them well and put them into the hot oil. Add a punter of cherry tomatoes and stir to make sure everything is coated in the oil. Return them to the oven and roast at high temp for about 10 mins. Turn everything over to cook evenly, cover with grated cheese and roast for another 10 mins. Absoutely delish xx