Preheat the oven to 375F.
In a large bowl, whisk together the cream, milk, eggs, vanilla and kirsch.
Spray a 13 x9 baking dish with nonstick spray. Then add the croissant pieces, cherries, and chocolate to the pan.
Pour the custard evenly over the top of the croissant pieces, then gently stir to coat.
Cover the pan with foil and bake in the preheated oven for 30 minutes. Uncover; bake for an additional 30 minutes.