Japanese
Score the underside of the prawns so they stay straight while frying.
Heat the oil to 180 C.
Beat the egg into the ice water, then lightly whisk in the flour, leaving the batter lumpy.
Dip each piece into the batter and let excess drip off.
Fry vegetables and prawns in small batches for 2-3 minutes until pale gold and crisp.
Drain on a rack and season lightly with salt.
Simmer dashi, soy, and mirin for the dipping sauce and serve alongside.