- 1 cup mayonnaise
- 2 tablespoons chopped fresh parsley
- 1 tablespoon finely chopped shallot
- 1 tablespoon sweet relish
- 2 teaspoons fresh lemon juice
- 1 teaspoon whole-grain or coarse-grain mustard
- 1/4 teaspoon salt
- 1/4 teaspoon black pepper
- 1 cup yellow cornmeal (not coarse)
- 3/4 teaspoon salt
- 1/2 teaspoon black pepper
- 1/2 teaspoon cayenne
- 3/4 cup all-purpose flour
- 2 large eggs
- 1/4 cup milk
- 4 (5-oz) flounder fillets
- 3/4 cup vegetable oil
- Pulse all sauce ingredients in a blender until parsley is finely chopped.
- Stir together cornmeal, 1/4 teaspoon salt, 1/4 teaspoon pepper, and 1/4 teaspoon cayenne in a shallow bowl. Stir together flour, 1/4 teaspoon salt, and remaining 1/4 teaspoon pepper and 1/4 teaspoon cayenne in another shallow bowl. Lightly beat together eggs, milk, and remaining 1/4 teaspoon salt in a third shallow bowl.
- Pat fish dry and dip fillets, 1 at a time, in flour, shaking off excess, then dip in egg mixture, letting excess drip off, and dredge in cornmeal until evenly coated. Arrange fish in 1 layer on a sheet of wax paper.
- Heat oil in a 12-inch nonstick skillet over moderately high heat until hot but not smoking, then fry fillets, 2 at a time, turning over once, until golden and just cooked through, 3 to 4 minutes per batch. Transfer to a paper-towel-lined plate to drain. Serve fish with sauce.