Flounder or Sole Fillets without ginger juice

4 (5 -6 ounce) flounder fillets salt , to taste fresh ground black pepper , to taste 1/4 cup Dijon mustard 1/3 cup all-purpose flour 1/3 cup yellow cornmeal ,[...]

1 lb flounder fillets 3 large potatoes 3 whole carrots 1 large onion 4 tablespoons unsalted butter , melted 1 pinch thyme minced parsley salt and pepper 1 1.[...]