I might add that the fish was delicious. I liked it better with the potato flakes than with panko or other bread crumbs but I guess I'll have to do a side by side to prove it to myself.
Nothing was added to the potato flakes. Lightly whisk a couple of eggs, dip the fish, and cover with the flakes. Experience says if you wait about 30 minutes before frying the flakes will stick to the fish a little better.