- 1/3 cup all-purpose flour
- 1/2 teaspoon salt, or to taste
- Freshly ground pepper, to taste
- 1 pound flounder, sole or haddock fillets
- 1 tablespoon extra-virgin olive oil
- 1 large shallot, finely chopped
- 1/2 cup dry white wine
- 1 cup freshly squeezed orange juice
- 1 tablespoon Dijon mustard
- 2 teaspoons butter
- 2 tablespoons chopped fresh parsley
- Mix flour, salt and pepper in a shallow dish. Thoroughly dredge fish fillets in the mixture.
- Heat oil in a large nonstick skillet over medium-high heat until shimmering but not smoking (see Tip). Add the fish and cook until lightly browned and just opaque in the center, 3 to 4 minutes per side. Transfer to a plate and cover loosely with foil.
- Add shallot to the pan and cook over medium-high heat, stirring often, until softened and beginning to brown, about 3 minutes. Add wine and bring to a simmer, scraping up any browned bits. Cook until most of the liquid has evaporated, 1 to 2 minutes. Add orange juice and mustard; bring to a boil. Reduce heat to low and simmer until the sauce thickens a bit, about 5 minutes. Add butter and parsley; stir until the butter has melted. Transfer fish to individual plates, top with sauce and serve.