For ➍4 tbs mayonnaise*
4 tbs grated horseradish
1 tbs minced fresh parsley
1 ts fresh lemon juice
Mix together mayo, horseradish, parsley and lemon juice in a small bowl.
Spread on fish before putting it in the oven.
Serve with firm fish, as in black trumpets with salmon & horseradish sauce.
*Replace 3 tbs of 4 (or even all 4) by sour (or whipped) cream to have a sauce that can also be served with roast beef or pork. Add 1 ts of mustard to heighten the flavour. It is served cold, at room temperature, or slightly warm. Heat carefully in a bain-marie or in a microwave oven. Don't let it boil.
