MAKES 20-22 PREP 35 mins plus cooling and chilling COOK 1 hr MORE EFFORT vegetarian 1kg floury potatoes such as Maris Piper, unpeeled 150ml vegetable oil, plus extra for deep-frying 4 onions, finely chopped 25g dried shiitake and kikurage mushrooms, rehydrated in boiling water white pepper, for seasoning 100g plain flour 3 eggs, beaten 250g panko breadcrumbs aonori seaweed, to serve (see tip, below) For the truffle miso mayo 5g shio kombu, finely chopped in a blender (optional, see tip…