Clean the leek, cut into 3 pieces each, cut lengthwise and rinse well. Cook in boiling salted water for about 12 minutes. Drain and let cool off
Boil the eggs hard for about 10 minutes. Peel and halve. Remove the egg yolk, crush it and mix it with the raw egg yolk. Stir in oil, vinegar, mustard, capers and red wine. Season with salt and pepper.
Wash and chop the chervil. Chop the egg white as well. Stir in both. Serve with the leek