Preheat your oven to 200°C (gas mark 6, 180°Fan) and peel and chop the potatoes into quarters.
Bring a pot of water to the boil and add salt. Add the potatoes to the pot and parboil for 10 minutes.
Whilst the potatoes are boiling, add oil and a tablespoon of marmite into your roasting tray and place in the oven.
Drain the water from the pot. Place the lid on the pot and shake the potatoes. This will rough up the edges and create really crispy potatoes.
Carefully take the roasting tray out of the oven and mix the marmite and oil together. Pour the potatoes into the tray and mix it into the marmite and oil mixture.
Bake in the oven for 40 minutes or until crispy on the outside and fluffy in the middle. Turn the potatoes over halfway.
Video
Notes
If you’re potatoes are medium to small in size, cut the potatoes into halves instead of quarters. For really small potatoes, parboil for only 5 minutes.