Cold Smoked Salmon Soufflé

• butter
• 2 tablespoons flour
• ½ pint hot milk

Melt 2 tablespoons butter in the top of a double saucepan; stir in flour until smooth. Add hot milk, stirring constantly until sauce begins to boil. Then reduce heat and simmer for 5 minutes, stirring from time to time. Remove from heat and stir in gelatine, which you have softened in