Sprinkle the sesame oil over the prawns, add the minced garlic and coat well. Add beaten egg white and coat.
In a bowl, combine the sesame seeds, the flour, the onion powder, turmeric, and a generous amount of salt and pepper.
In a bowl, combine the mayo, vinegar and wasabi. Season to taste and transfer to a small black bowl. This makes the body of the spider. Place in the center of a large round dish, preferably a lighter colour like mauve.