Season fish fillets with salt, black pepper, and paprika.
Coat each fillet first in flour, then dip in beaten eggs.
After coating in flour, shake off excess before dipping in egg to ensure a light crisp crust.
Press fillets into panko breadcrumbs until evenly coated.
Heat vegetable oil in a skillet over medium heat.
Fry 3–5 minutes per side depending on thickness until golden and fully cooked.
Remove and drain excess oil on paper towels.
Lightly toast burger buns if desired.
Assemble sandwich with fried fish, lettuce, tomato, and tartar sauce.
Serve hot for best crispiness.