Pre heat oven to 220c/200c Fan/Gas Mark 7.
In a large pan bring some salted water to boil.
Wash potatoes, place into the boiling water and par boil for 4 - 5 minutes.
Place a pan into the oven.
Add boiling water to an average sized mug, crumble the stock cube into the mug and stir.
Drain the potatoes and bash about in the pan to fluff them up.
Remove the hot pan from the oven, place the potatoes in, pour over the stock and then spritz each potato with Frylight.
Season with salt & pepper and Rosemary.
Place in the oven for around 30 – 40 minutes or until the stock has been fully absorbed and the potatoes are crispy.