Season the fish fillets with salt. Combine the herbs and the potato flakes in a shallow dish. Dip the flesh side of each fillet into the egg wash and then press them into the herb/potato flake mixture. Put on a sheet tray with the crusted side up.

Coat a large saute pan with olive oil and heat it over medium-high heat. When the oil is hot but not smoking, add the fish, crusted side down. When the crust has become golden and crispy, flip them over.