01 - Combine the dried fruit and hot black tea in a bowl. Cover and let soak for at least 1 hour, or overnight for optimal results, allowing the fruit to plump up completely.
02 - Preheat the oven to 340°F. Grease a 2 lb loaf tin and line with parchment paper.
03 - In a large mixing bowl, whisk together the granulated sugar, egg, and melted butter until smooth and well combined.
04 - Add the soaked fruit along with any remaining tea liquid to the sugar mixture, stirring to incorporate evenly.
05 - Sift the flour, baking powder, cinnamon, nutmeg, and salt into the bowl. Add orange zest if using. Gently fold until just combined—take care not to overmix the batter.
06 - Transfer the batter to the prepared loaf tin and smooth the top surface evenly with a spatula.
07 - Bake for 55–65 minutes, or until a wooden skewer inserted into the center emerges clean.
08 - Allow the cake to cool in the tin for 10 minutes, then remove and transfer to a wire rack to cool completely.
09 - Dust with powdered sugar before serving if desired. Slice and serve plain or with butter.