Step 1

Preheat the oven to 200C/180C Fan/Gas Lightly oil a baking tray. Mix the herbs, salt and pepper in a large bowl. Pour the oil into a second bowl.

Step 2

Place two wooden spoons or chopsticks on a chopping board, about 5cm/2in apart. Place the potatoes one at a time between the handles. Using a sharp knife with a thin blade, cut the potatoes very thinly and vertically almost all the way through – the knife will stop slicing when it meets the spoons. Each slice should be a little narrower than a pound coin.

Step 3

As you prepare each potato, add it to the oil and turn to coat, then add to the seasoning mix and rub all over the potato, making sure a little of the seasoning mix gets in between the slices.

Step 4

Place the potato on the baking tray, cut-side up. Prepare the remaining potatoes in the same way. Drizzle any remaining oil over the potatoes and bake for 40 minutes.

Step 5

Take the tray out of the oven and dot each of the potatoes with a little butter, then bake for a further 10 minutes, or until golden, crisp and tender. Check for tenderness with the point of a knife or the tip of a skewer. (If you don’t want to use butter, cook the potatoes for around 50 minutes in total.) Serve immediately.