Step 1

Preheat the oven to 400F / 200C. Line a baking sheet with parchment paper.

Step 2

Cut slits in the potatoes, about ⅛ inch apart, but don’t cut all the way through. It may be helpful to lay a chopstick or wooden spoon handle on either side of the potato, then cut the slits so the knife can’t go all the way through.

Step 3

Place the potatoes in a single layer on the baking sheet. Drizzle or spray with olive oil and season with salt and pepper. Place the tray in the oven and bake for 30 - 45 minutes or until cooked through with crispy cut ends. The time will depend on the size of your potatoes.

Step 4

Meanwhile, make the tomato sauce. Heat the oil in a frying pan, add the onion and cook for 4 minutes. Add the garlic and harissa paste and cook for a further minute.

Step 5

Add the stock, tomatoes and tomato paste. Bring to the boil for 5 minutes to reduce slightly. Season with salt and pepper.

Step 6

Serve the tomato sauce with the baked hasselback potatoes.