Wash the herbs. If necessary, remove the leaves from the stems and roughly chop them. Place in a deep bowl.
150 g herbs for green sauce (borage, chervil, cress, parsley, burnet, sorrel and chives)
Add the yoghurt and crème Fraiche or sour cream to the herbs. With a hand blender, puree the herbs. Alternatively, you can chop the herbs very finely and then mix them in with the yoghurt-crème Fraiche mixture.
150 g creme fraiche , 150 g full fat yogurt
Peel the onion and cube very finely.
1 small onion
Add the onion cubes, olive oil, mustard and lemon juice to the mixture. Season with salt and pepper.
1 teaspoon mustard , 1 tablespoon olive oil, 1 tablespoon lemon juice , salt and pepper
Allow the mixture to rest for an hour (ideally overnight) in the fridge or a cool place before serving.