500g of prawns (or langoustines)
100g of flour
15g baking powder
Boil a saucepan of water over a high heat. Toss in the prawns and cook them for 45 seconds.
Remove them and place them in a bowl with cold water and ice for one minute to stop them from cooking. Remove and peel if they have shells on, and set aside.
Mix the flour and baking powder together, add the beaten egg yolk, keeping the egg white to whisk and add just before battering.
Heat the oil for frying; when it begins to smoke add the prawns after dipping in the previously prepared mixture.
Fry until golden brown and place on absorbent paper towels.