Using a large knife or meat cleaver, finely chop the prawns until it resembles a paste.
Put the chopped prawns into a bowl, then add the ginger, egg white, garlic, and 1 tsp light soy sauce and mix well.
Chill in the fridge for at least 30 minutes.
Take each piece of bread, and spread the prawn mixture on top and make sure you cover the bread right up to the edges.
Place the sesame seeds on a large plate. Carefully, take the bread and dip it prawn side down on to the sesame seeds - the sesame seeds will stick to the prawns.
Heat around 3 inches of vegetable oil in a large wok or pan until it reaches a temperature of 170c-180c. I prefer to cook each piece of bread one at a time. Shallow fry the bread on each side for around 1-2 minutes until the sesame seeds are golden.
Cut each piece into four triangles and serve with soy sauce or chilli sauce.