Mix all of the ingredients in bowl and let rest for at least 2 hours in the refrigerator.
Wasabi Aioli
In a bowl set over an ice bath, whisk together all of the ingredients, excluding the olive oil. While whisking continuously, slowly add the oil (be carefully not to over mix or the aioli may become bitter)
Pour into a squeeze bottle and keep refrigerated until service.
Fried Shrimp
In a medium pot, heat about a quart of canola oil to 350 F.
Separate the four, whisked eggs and breadcrumbs into three bowls (in that order)
Season the panko breadcrumbs with the cayenne, salt and pepper.
Dredge the shrimp with flour and dust off excess.
Dip the shrimp in the egg and then the panko. Firmly press the panko onto both sides of the shrimp.
Gently drop about 4-5 shrimp at a time into the hot oil. Cook until golden brown; about 1-2 minutes.
Remove the shrimp from the oil with a nest or slotted spoon and transfer to paper towels to be rid of excess oil.
For Service
Preheat the Oven to 350 F.
Lightly warm the buns on a sheet pan for about 3 minutes. If need be, place the fried shrimp on a sizzle platter and reheat in the oven as well.
Gently open the buns and place a dollop of aioli on the bottom and place a shrimp on top (like glue). Place a small cluster of the pickled vegetables on top of the shrimp and then drizzle with aioli.
Each rectangular plate should have 3 buns each.
Recipe by A Sue Chef at https://www.asuechef.com/fried-shrimp-steamed-buns/