Maris Piper potatoes 2.5 kg,
peeled and cut into small chunks
rosemary a few sprigs
Heat the oven to 200C/fan 180C/gas 6.
Par-boil the potatoes for 5 minutes then drain. Toss with 4 tbsp oil and spread on a baking tray. Season then cook for 20 minutes. Sprinkle over the rosemary, toss then keep cooking for 20-30 minutes until crisp and golden. Sprinkle with sea salt.