Eggnog French Toast Bake

Name: Eggnog French Toast Bake
Ingredients: 1/2 cup (1 stick) unsalted butter; 1/2 cup firmly packed light brown sugar; 1 teaspoon kosher salt; Vegetable shortening, for greasing the baking dish; 6 large eggs; 2 cups half-and-half; 1 teaspoon vanilla extract; 1/2 teaspoon ground cinnamon; 1/4 teaspoon freshly grated nutmeg; 1/3 cup plus 2 tablespoons granulated sugar; 8 day-old croissants, split; Three 6-ounce containers fresh raspberries; 1 tablespoon lemon juice; 1 tablespoon turbinado sugar; 2 cups heavy whipping cream; 1/2 cup powdered sugar, plus more for dusting; 2 tablespoons bourbon; 1/2 teaspoon kosher salt