01 -
In a shallow bowl, vigorously whisk eggs with flour, garlic powder, 1/2 teaspoon kosher salt, and 1/4 teaspoon black pepper until smooth. Pour panko breadcrumbs into a separate shallow bowl.
02 -
Pat fish fillets dry with paper towels. Season both sides evenly with salt and freshly ground black pepper.
03 -
Dip each piece of seasoned fish into the egg-flour mixture, coating thoroughly. Transfer immediately to panko breadcrumbs, gently pressing to ensure an even, firm coating.
04 -
Pour oil into a heavy skillet to a 6 mm depth. Heat over medium until shimmering and a breadcrumb sizzles when dropped in.
05 -
Fry breaded fish fillets in batches, turning once halfway, until golden brown and cooked through, about 2 to 3 minutes per side. Remove and drain on a paper towel-lined plate. Sprinkle with a pinch of salt while hot.
06 -
Place a slice of American cheese on the bottom half of each toasted potato bun. Arrange a hot fried fish fillet on top, followed by a generous spoonful of tartar sauce. Close each sandwich with the top bun and serve immediately, offering extra tartar sauce on the side.