How to Make It
Preheat the oven to 350°. Butter a 9-inch round cake pan. In a medium bowl, beat the egg yolks with the sugar until pale. Add the flour and mix well, then gradually whisk in the milk, orange zest, orange flower water and orange liqueur.
In a large stainless steel bowl, beat the egg whites with clean beaters until they are stiff but not dry. Fold the beaten whites into the egg yolk mixture and pour the batter into the prepared pan. Bake for about 30 minutes, or until the clafoutis is golden brown. Remove from the oven and let cool slightly. Cut the clafoutis into wedges and serve warm or at room temperature.