3 Belgian endives cut crosswise into 1/2-inch-wide slices
1 bunch of celery ribs thinly sliced crosswise (1 to 2 cups, depending on the size of your bundle)
Equipment
electric coffee grinder or mortar and pestle
small bowl or cup
large bowl
Directions
Grind fennel seeds in a grinder until ground but not powdery. Transfer to a small bowl or cup, then stir in oil until combined. Let stand 15 minutes.
Whisk together lemon juice, shallot, salt, and sugar in another small bowl or cup until salt and sugar are dissolved. Stir fennel oil, then add to shallot mixture in a slow stream, whisking until combined.
Toss lettuces and celery in a large bowl with just enough vinaigrette to coat. Season with black pepper to taste.