On making the perfect gratin dauphinois (potato gratin): "The secret to gratin dauphinois is to cook it very, very slowly. Because the potatoes shouldn't be cooked but rather stewed in milk and cream. I add a bit more garlic than the recipe traditionally calls for, and most importantly, more pepper. It's totally my personal taste, but I find that the gratin dauphinois deserves and welcomes black pepper."