Combine milk and vanilla bean in a pot and steep for at least 1 hour.

Preheat oven to 350 degrees F (175 degrees C). Grease an 8-inch baking dish with butter. Spread out cherries in the bottom of the prepared baking dish.

Combine 1/2 cup flour, 1/2 cup sugar and salt in a bowl. Add eggs one at a time; beat with an electric mixer after each addition until smooth and creamy.

Remove vanilla bean from milk and discard. Add milk to egg mixture. Pour in heavy cream; mix until smooth. Pour mixture evenly over cherries.

Bake in the preheated oven until top of clafoutis is golden, 45 to 50 minutes. Remove from the oven and sprinkle 2 tablespoons sugar on top. Let cool slightly before serving so that the clafoutis is set. Serve warm or at room temperature.