Preheat the oven to 200°C (400°F/gas mark 6). Cut the potatoes into thick chips and spread out in a baking tin lined with non-stick baking paper. Spray lightly with oil and season with salt.

Slice your potatoes into chips (about the thickness of your index finger) and place them in a ... In a separate small bowl, mix the cornflour with 2 tablespoons of water. Turn down the heat ...