Authentic Alsatian Quiche Lorraine: crisp butter pastry shell filled with thick smoked pork lardons, rich crème fraîche, and egg custard, baked until puffed and golden.
Line tart tin with pastry and blind bake at 200°C for 15 minutes with baking beans, then 5 minutes without beans until dry.
Sauté lardons in a dry pan for 5 minutes until fat renders and edges are crisp. Drain on paper towels and scatter across pastry base.
Whisk eggs, egg yolk, crème fraîche, milk, nutmeg, salt, and white pepper until smoothly blended.
Pour custard over lardons. Scatter grated Gruyère on top. Bake at 180°C for 30-35 minutes until puffed, golden, and gently set in the center.