Step 1

Season fish with Old Bay seasoning, salt and pepper, to taste.

Step 2

BUTTERMILK MIXTURE: In a medium bowl, whisk together buttermilk, egg and hot sauce.

Step 3

Working one at a time, dredge fish in flour, dip into BUTTERMILK MIXTURE, then dredge in Panko, pressing to coat.

Step 4

Heat vegetable oil in a large stockpot or Dutch oven over medium high heat until it registers 360 degrees F on a deep-fry thermometer.

Step 5

Working in batches, add fish and fry until golden brown, turning occasionally, about 3-4 minutes. Transfer to a baking sheet fitted with a wire rack and keep warm.*

Step 6

To serve, spread buns with tartar sauce, then top with fish and cheese slices.

Step 7

In a small bowl, whisk together mayonnaise, relish, dill and lemon juice; season with salt and pepper, to taste.