Line a baking tray with foil

Spray some olive oil on the tray and add some salt to it too

Wash then slice the potatoes but only as much as half way through along the top side of each potato

Lay potatoes on baking tray

Spray more olive oil onto the potatoes and add a sprinkling more of salt across the top of all the potatoes

Bake in the oven for about 25 mins (more if needed until cooked through) at approx 185/190 in a fan oven