Blueberry Buttermilk Clafoutis

Preheat the oven to 350 degrees F (175 degrees C). Grease a baking dish with butter.

Place a layer of blueberries into the prepared baking dish.

Combine flour, baking powder, and salt in a small bowl. Whisk together buttermilk, eggs, and sugar in a large bowl. Add flour mixture to buttermilk mixture and stir until batter is smooth. Mix in vanilla extract and orange zest. Carefully pour over blueberries in the baking dish.