Clean and devein shrimp, pat completely dry and season with salt, onion powder, garlic powder, white pepper, black pepper, and suya spice
For the remoulade sauce, mix all ingredients thoroughly until well incorporated. Combine half of the sauce with the coleslaw mix and refrigerate both.
Add vegetable oil in a deep frying pan and set pan over medium-high heat.
In a bowl, mix cornmeal, flour, salt and Cajun seasoning. Coat shrimp evenly with this mixture. Dredge the shrimp in the egg, then in the cornmeal-flour mixture.
Remove any excess breading from the shrimp and fry until golden on both sides, approximately 2-3 minutes in total. Place the fried shrimp on a rack or paper towels to drain.
Melt butter in a pan and gently toast the inside of the roll. Spread a layer of remoulade sauce, then add the fried shrimp and creamy slaw. Finish it off with a sprinkle of freshly chopped chives.