Add grated cheese at the end to make a creamy cheese sauce ... instead of cheese makes a great sauce for fish or gammon. A couple of teaspoons of mustard makes a mustard sauce.
Stir in the wine or vermout, Gruyère, mustard and cream. Cook over a low heat ... bay leaf and lemon peel. Add the fish to the pan with the sauce and heat very gently for a 2 minutes to warm ...
Season turkey fillets by smearing them with mustard ... until sauce of mixture thickens; then bring fillets back to skillet. Allow to cook for 15 minutes in white sauce. Stir in cream.