Preheat oven to 375°F. On a sheet pan lined with foil, lay the fish. Drizzle with a little olive oil, kosher salt and peppert. Bake for 18-20 minutes. Let cool. In a bowl combine the my, vinegar, pepper, garlic powder, onion powder, celery salt and combine. Add the celery and the fish. Flake the fish lightly and combine. Serve with a side salad. Bon Appetit.