Defrost the prawns. For the tempura dough, mix starch, flour and baking powder. Add egg, 1/8 l water, approx. 1/2 tsp salt and curry and mix to a smooth dough with the whisks of the mixer.
Leave to soak for about 20 minutes.
In the meantime, rinse the prawns briefly and pat them dry well. Heat the oil in a deep fryer or pot to approx. 180 °C (measure with a roast thermometer; or hold a wooden stick inside - if bubbles rise, the correct temperature has been reached).
Pull the prawns through the dough with a fork and let them drip off a little.
Fry the prawns in portions in hot oil for about 4 minutes until crispy, turning from time to time. Drain on kitchen paper. Arrange the prawns with the asian sauce.