Christmas Croissant Pudding with Sour Cream and Brown Sugar Sauce

Name: Christmas Croissant Pudding with Sour Cream and Brown Sugar Sauce
Ingredients: 3 cups whole milk; 1/2 cup (1 stick) unsalted butter; 1/2 cup sugar; 1 vanilla bean, split lengthwise; 6 large eggs; 1/4 cup all purpose flour; 1 1/2 teaspoons ground cinnamon; 1/2 teaspoon ground nutmeg; 1/2 teaspoon baking soda; 1/8 teaspoon salt; 8 croissants (about 1 pound), torn into 3/4-inch pieces; 1 cup pitted prunes, chopped; 1 cup raisins, chopped; 1/2 cup coarsely chopped almonds; 1 tablespoon grated lemon peel; 2 cups sour cream; 1/2 cup (packed) golden brown sugar; 1 tablespoon grated orange peel; 1/2 cup brandy