black pepper - to taste (freshly ground, to taste)
hard-boiled egg - 1 (for garnish)
Instructions
Prepare the leeks: Cut the leeks lengthwise to open them up and release any sand or grit.
Boil the leeks: Bring water to a boil, add salt, and cook the leeks for about 10 minutes until tender.
Check for doneness: Use the tip of a pairing knife to check if the leeks give no resistance.
Make the vinaigrette: In a bowl, combine olive oil, vinegar, capers, and Dijon mustard. Adjust salt and add freshly ground black pepper.
Assemble the dish: Cut off the bottom part of the leeks, arrange them on a plate, drizzle the vinaigrette over the leeks, and garnish with a hard-boiled egg.