Take the fish out of the bag and lay them in a row. Sprinkle salt over them, then flip and repeat.
Let them rest with the salt for 15 minutes. This draws out excess moisture from the fish and makes it firmer and juicier. I use this technique for almost all the fish I prepare.
After 15 minutes, rinse the fish under cold water and pat them dry thoroughly. This can be done with a kitchen towel or paper towels.
The fish is now ready to be breaded.
Whisk eggs and pour them onto a plate.
Pour flour onto a plate along with salt and pepper.
Pour your breadcrumbs/panko onto a plate.
Coat the fish in flour and then in the eggs.
Finally, coat them in the panko/breadcrumb mixture and place them on a cutting board.
Add plenty of butter to the pan and heat it over medium-high heat.
When the butter stops foaming, carefully place the fish in the pan.
The fillets need to be fried for about 3-4 minutes on each side. If you insert a meat skewer into the fish and it "meets no resistance," then it is done.