Frankfurt sauce is served to boiled potatoes, meat, etc.
How to prepare green sauce:
1 Egg yolks mash with a fork, mixed with vegetable oil. We add mustard and vinegar. Sugar, salt, pepper - to taste. And mix until homogeneity.
2 Pour into the bowl of sour cream, prepare the greens. It is believed that the greens need to be finely chopped by hand. You can just grind in a blender, and leave some of the herbs, finely chop and add for beauty.
3 Mix sour cream with herbs, add yolk mass and mix until homogeneity. Finely chop and add the remaining egg white. Leave to stand for about an hour at room temperature.