Maple syrup and mustard gammon with gratin

Method

Preheat the oven to 200°C/fan180°C/gas 6. Make the creamy gratin. Put a quarter of the potatoes in a casserole dish, sprinkle with a third of the onion, dot with a third of the butter, then sprinkle with a third of the flour. Season well. Repeat to make 2 more layers, then finish with a layer of potato. Pour over the milk and cook for 1 hour 20 minutes, until the potatoes are tender and golden and the sauce has thickened.

Meanwhile, put the gammon into a small roasting tin. Cover with foil and cook above the potatoes for 1 hour.

Meanwhile, mix the maple syrup, mustard and peppercorns. When the gammon has cooked for 1 hour, remove from the oven and carefully slice off and discard any skin, leaving the layer of fat behind. Score the fat in a diamond pattern and spread with the maple syrup mixture. Return to the oven for a further 20 minutes.

Leave the gammon and gratin to stand for 5 minutes, then carve the gammon into slices. Serve with the gratin and some green veg.