How long does it take to cook roast potatoes?

It depends how big or small you've chopped your potatoes, if you've par-boiled them and how hot your oven is. For SuperFast 'tatoes; chop them to an inch and a half square, blanche them in boiling water for three minutes. Let them steam off before chucking them into 200 / 210•c oil. Aggitate every 6-7mins, should be ready to go in 25-30mins.

For good olde Traditional roast potatoes, chop to decent size roasties (children get three, grown-ups get 5-6) and hoof into hot oil, 2cm deep, sprinkle with pepper and the herbs from the roast (Rosemary and thyme are great!), toss in the oil and cook at between 180•c at the top of the oven and 210•c nearer the bottom. Turn or aggitate every 20 minutes or so, should be done in about an hour. Roasties really benefit from meat juices in flavour but be warned, you'll lose a bit of crispiness - it all comes down to wether the perfect roast potato experience for YOU is taste or texture? I add meat juices but turn the oven right up to 230•c for 10mins at the end, as the meat is resting. DONT ADD POULTRY JUICES/FAT!! It's sticky and if far better made into gravy than messing up your nice, crispy 'tatoes!