Preheat oven to 220°F. Cut the potatoes into wedges and put in a roasting tin. Drizzle over two tbsp of the oil, making sure all the potatoes are covered. Bake for 30 minutes until crispy on the outside and soft inside.

Meanwhile, heat the remaining oil in a pan and fry leek until softened. Tip the tuna and chilli tomatoes, breaking the tuna down until well combined with the tomatoes.

Cook for a few minutes until.hot. Season and spoon over the potatoes in the roasting tin, mixing gently. Serve immediately.