Rinse and pat dry white fish fillets. In one bowl, combine flour, salt, pepper, and paprika; in another, beat an egg. Place breadcrumbs in a third bowl.

Dredge fish in flour mixture, dip into beaten egg, then coat with breadcrumbs.

Heat oil in a frying pan over medium heat. Fry fish fillets for 4-5 minutes per side until golden brown.

Toast burger buns in a skillet until golden and crisp, about 2 minutes.

Assemble the burger with a fish fillet, lettuce, tomato, and tartar sauce on the toasted bun.