Step: 1/8

Preheat the oven to 220°C (200°C fan, gas 7). Wash and peel the potatoes and cut into 3mm thick slices.

Step: 2/8

Halve the leek lengthwise, wash well, shake dry and slice.

Step: 3/8

Finely grate the cheese.

Step: 4/8

Heat the milk with the cream, salt, pepper and nutmeg in a saucepan until just boiling. Peel and crush the garlic clove and add to the pan. Add the potato slices and simmer for about 10 minutes, stirring occasionally.

Step: 5/8

Dice the ham and place in a bowl with the leek. Remove the potatoes from the pan with a slotted spoon and add to the leek and ham.

Step: 6/8

Mix together gently and spread out a buttered baking dish.

Step: 7/8

Spoon over the milk and cream mixture with a ladle.

Step: 8/8

Sprinkle with grated cheese and top with small pieces of butter. Bake in the preheated oven for 20 minutes until golden brown on top.