Green peppercorn sauce

Ingredients:
1 table spoon of green peppercorns (preserved)
2 tea spoons of original grain mustard (Maille à l'Ancienne)
2 tea spoons white onions minced
1 table spoon cooking cream
1 table spoon of strong french mustard


Serves 3 burgers

Preparation:
Grind the green peppercorns with the onions in a mixer untilll very fine, add the french and grain mustard, the cooking cream and stirr well untill all blended.