Sprinkle 2 tablespoons sugar over the berries. Combine the bread and the berries and spread out evenly in the baking dish.
Combine the milk, eggs, yolks, sugar, Kirsch, allspice and vanilla in a saucepan over very low heat, stirring constantly with a wooden spoon. Cook for 7 to 9 minutes or until the mixture begins to thicken. Strain through a fine wire mesh strainer and pour over the bread in the baking dish.
Set the baking dish in a shallow water bath and place the whole setup into the oven. Bake for 45 minutes. Remove and cool.
When cool, sprinkle the top with the confectioners' sugar and glaze under a hot broiler before serving.