Chop each potato into 2 or 3 parts, depending on size
Par-boil your potatoes in boiling water for 8 minutes. When ready, drain and shake to rough up the edges.
Pop your potatoes into a deep baking dish
Prepare your stock. Once ready, pour the stock over the potatoes, so it covers around 2/3’s.
Spray the tops of the potatoes with Frylight and season them lightly
Cook in the oven until the stock has evaporated (around 1 hour)
Notes
If you've been cooking your potatoes for an hour or so and still seem to have loads of stock left, you can cheat a little and pour a bit out to speed them up!