- 8 leeks
- Salt
- 1 tablespoon Dijon mustard
- 2 tablespoons sherry vinegar
- 3 tablespoons extra-virgin olive oil
- Freshly ground black pepper
- Trim the tough dark-green ends from leeks; discard, or set aside for another use. Trim root hairs; discard. Then, starting about 1/2 inch from the root end (which stays intact), slice each leek lengthwise from base to tip with a sharp knife. Rinse leeks thoroughly to remove sand.
- Fill a bowl with ice water; set aside. Bring a large pot of water to a boil. Salt well, and add leeks. Blanch until leeks are very tender, about 4 minutes. Transfer leeks to the ice bath; submerge them immediately. Once leeks are cold, drain them, pat them dry, and set them aside.
- In a small bowl, combine mustard and vinegar. Slowly drizzle oil into bowl, whisking to form a thick vinaigrette. Adjust seasoning with salt and pepper.
- Lightly brush leeks with some vinaigrette, and arrange them on a medium-hot grill or grill pan. Grill leeks until they are hot and have grill marks, about 2 minutes per side. Remove leeks from grill, and toss with remaining vinaigrette. Serve.