Breakfast Bread Pudding Casserole with Blueberries

Cut bread in half lengthwise. Spread bottom half with lemon curd. Replace top and cut down center from end to end, then crosswise into 3/4" slices. Arrange bread in small (2 1/2-cup) gratin or shallow baking dishes or a 13" x 9" baking dish. Place small baking dishes on 2 jelly roll pans. Lightly beat eggs. Add milk, half-and-half, sugar, vanilla, and salt, beating until blended. Pour 2/3 cup custard into each small casserole. Refrigerate at least 2 hours or overnight. Heat oven to 325 degrees F. Bake small casseroles 50 to 55 minutes (large casserole 1 to 1 1/4 hours), until cooked through. For blueberry sauce, combine sugar and cornstarch in small saucepan. Stir in water until smooth. Add blueberries. Cook, gently stirring over low heat, just until boiling, about 5 minutes. Boil 30 seconds and remove from heat. Serve with bread pudding.