Add the shelled and uncooked prawns to the food processor until they're well minced.
Then add the Pork, Eggwhite, Soy Sauce, Water Chestnuts, Sugar, Sesame Oil, and Spring Onions until the ingredients become a nice smooth paste that is easy to spread.
You can choose to cut the crust off of the bread, cut pretty shapes into the bread with cookie cutters, or just spread full slices of white bread with the crust on. Spread the prawn mix evenly over one side of the bread.
Pour the Sesame Seeds into a wide shallow bowl and dip the prepared pieces of bread with the prawn mixture facing down into the sesame seeds. Push them into the Sesame Seeds until there's a nice even covering of seeds all over the Prawn mixture.
Then fry the bread in hot Vegetable Oil for about 3 to 5 minutes. Test the temperature of the oil by frying one piece first so you'll know how long to cook the remaining pieces. Turn the pieces so that both sides cook to a nice brown colour and place them in paper towel to drain off some of the cooking oil.
Notes
Go easy with the sesame oil as it can be overpowering if you splash too much in. I'm also not the biggest fan of Ginger so I'll leave it out but most prawn toast recipes I have looked at will include Ginger. It works just as well without the Pork mince too if you don't eat Pork.
Recipe by Good Food Recipes at https://www.goodfoodrecipes.com/prawn-toast-recipe/