Made with wholesome ingredients and oven-fried for easy prep, these crispy fish sandwiches are far more flavorful than their fast-food counterparts and only take 30 minutes to make.
Preheat the oven to 425°F and coat a baking sheet with nonstick spray.
Whisk the egg and milk together in a shallow dish.
Spread the breadcrumbs on a plate, and add 1 teaspoon of salt, and a few grinds of black pepper. Combine well. Drizzle the seasoned breadcrumbs with 1-1/2 tablespoons of vegetable oil and use your fingertips to distribute it through the mixture.
Cut the fish fillets into 4 evenly-sized pieces and coat both sides with the egg mixture. Press each fillet gently into the breadcrumbs to be sure they're well coated.
Arrange the fish on the prepared baking sheet and bake for 8 to 12 minutes (depending on thickness), or until the fish flakes easily and the coating is crisp and golden.
While the fish is cooking, make the tartar sauce by combining the mayonnaise, relish, Dijon mustard, lemon juice, and onion in a small mixing bowl.
Once the fish is crispy and cooked through, top each fillet with a slice of cheese and return them to the oven just long enough for the cheese to melt.
To serve, place lettuce on the bottom half of each sandwich roll and top with a piece of fish, and a spoonful of tartar sauce.
Notes
ABOUT THE FISH: Mild white fish fillets like tilapia, catfish, or barramundi are the perfect choice for oven-frying because they cook through in about the same amount of time it takes for their crumb coating to turn crisp and golden brown. Note: When buying farm-raised fish, we recommend looking for the country of origin and finding products labeled "responsibly or sustainably raised." In general, avoid fish raised in China.ABOUT THE TARTAR SAUCE: As written, this recipe makes a little more than a 1/4 cup of tartar sauce. This is enough for about 1 tablespoon per sandwich. If you like more or would like to put some away, you can simply double the recipe.