- Preheat the oil in a deep fryer or a heavy-bottomed 4 quart pot to 325°F (160°C). If using a pot, fill the pot with at least 3 inches of oil.
- While the oil is heating, wash and cut the potatoes into thin wedges. Soak the wedges in ice water for 5 minutes, then drain and pat them dry.
- While the potatoes are soaking, make the Citrus Ponzu Dipping Sauce by mixing Kikkoman® Yuzu Ponzu together with mayonnaise. Set aside.
- Once the potato wedges are drained and dried, prepare the potato wedge coating. In a medium bowl, whisk together the egg, buttermilk, and salt until well combined. Pour the Kikkoman® Karaage coating mix into a separate medium bowl.
- Using tongs, dip each potato wedge into the egg and buttermilk mixture, making sure to coat all sides. Then, transfer the wedges to the bowl with the Kikkoman® Karaage coating mix and coat each wedge evenly.
- If not using an oil thermometer, check if the oil is hot enough by placing a small piece of raw potato in the oil; the oil around the potato should bubble. Fry the potato wedges in the preheated oil for 4-6 minutes, or until the coating turns golden brown and the wedges are tender when pierced with a fork. For best results, add a single layer of the wedges in the fryer or pot for each batch of frying. Remove the wedges from the fryer with tongs and place them on a wire rack or paper towel lined plate to allow the excess oil to drain off.
- Transfer the fried wedges to a serving platter and serve with Citrus Ponzu Dipping Sauce.