Instructions
- Sauce: very finely chop the onion, whisk the mustard and vinegar, gradually, without stopping whipping, pour in the olive oil. Add salt and pepper. I whipped everything up in a blender. * The sauce was too rich for me, and I added sour cream 4 tbsp. (the Sauce turned out a lot, left it for tomorrow, then pour the salted casserole, drive into the cutlets, pour the vegetable salad.)
- Place the leeks on a platter and pour the mustard sauce over them while they are still hot. Sprinkle the onion with the yolks, whites and herbs so that you get colorful strips, and serve. (For large meals, you can prepare the dish the day before, and just before serving, pour the sauce over it. You can serve it hot, warm, or cold.)