(Saveur Magazine)
3 tbsp. Dijon mustard
3 egg yolks
1½ cups canola oil
¼ tsp. cayenne
Juice of 2 lemons
2-3 lb. celery root, peeled and cut into 1/8"-thick matchsticks
1 tbsp. minced kalamata olives
Kosher salt and freshly ground black pepper, to taste
¼ cup thinly sliced parsley
Whisk together mustard and yolks in a bowl; while whisking constantly, slowly drizzle in oil, a few drops at a time, to emulsify. Continue slowly streaming oil into bowl and whisking until a smooth mayonnaise forms; stir in cayenne and juice. Add celery root, olives, and salt and pepper, and toss to coat, Cover with plastic wrap and chill until celery root wilts slightly, about 40 minutes. Stir in parsley before serving.