Cook and mash the potatoes

• Boil the peeled potatoes in salted water until tender.
• Drain and mash them until smooth.

Make the potato mochi dough

• Add the potato starch to the mashed potatoes and mix into a smooth dough.
• Fold in the mozzarella if using.

Shape and pan fry

• Shape the dough into small oval patties.
• Pan fry them in the oil until golden and crispy on both sides.

Make the soy sauce glaze

• Combine the soy sauce, mirin and sugar in a small saucepan.
• Warm over low heat until the sugar dissolves and the glaze thickens slightly.

Skewer, glaze and serve

• Thread the fried potato mochi onto skewers.
• Brush generously with the soy sauce glaze and wrap with nori strips.