Preheat the oven to 200°C (top/bottom heat). Peel and halve/quarter the potatoes. Halve the garlic bulb. Place in a large roasting tin with the ribs. Peel and slice the ginger, bring to the boil in a pan with the spices, sugar,
600 ml water and soy sauce. Pour over the ribs and potatoes. Cover and cook on a medium heat for approx.
90 minutes. Cut the leek into rings and add to the roasting tin 15 minutes before the end of the cooking time.
Boil 400 ml water with honey and miso. Stir in the butter and reduce until creamy.
Remove the roasting tin from the oven, increase the temperature to 220°C and baste the ribs with the miso sauce. Cook uncovered on the middle shelf for 15-20 minutes until browned.