Step 1

Adjust oven rack to center position and preheat oven to 300°F. Pat fish dry on paper towels and season generously with salt and pepper. Place flour, egg, and breadcrumbs in three separate shallow bowls or plates. Season each gently with salt and pepper. Working one piece at at time, lift fish and dip, presentation-side-down, in the flour, followed by the egg, followed by the breadcrumbs, pressing down firmly until a thick layer of breadcrumbs adheres. Place fish breaded-side-up on a clean plate and repeat with remaining fish.

Step 2

Heat oil in a large non-stick or cast iron skillet over medium heat until shimmering. Add fish pieces, breaded-side-down and cook, swirling and rotating them around the pan until deep golden brown, about 5 minutes. Carefully flip fish and transfer to oven. Cook until an instant-read thermometer inserted into the deepest part of the fish registers 140°F, about 5 minutes (a knife or a cake tester inserted into the fish should show no resistance). Serve immediately with lemon wedges or tartar sauce.