Heat oven to 220C/200C fan/gas 7.
Boil the potatoes for 5 mins. Drain well,
place back in the pan, cover with a lid
and shake vigorously to lightly roughen
up the edges.
Meanwhile, grind the
spices using a pestle and mortar until
lightly crushed, then mix with the oil.
Put the spice mix in a roasting tin and
place in the oven to heat up. Carefully
put the potatoes into the roasting tin,
tossing them in the hot oil and spice
mixture. Roast in the oven for 40-45 mins
or until crisp and golden, turning once or
twice during cooking.