Grease and dust with flour a 9-inch springform pan and set aside. Chop apples and figs and set them aside.
Preheat the oven to 375 degrees Fahrenheit.
In a mixing bowl, whisk together all dry ingredients (polenta, flour, breadcrumbs, sugar, salt, and cinnamon).
In a separate bowl, mix the milk, eggs, oil, and honey. Add the wet mixture to the dry and stir to form a smooth batter. The batter is quite prone to create lumps, so keep stirring with a whisk until you have a smooth mixture.
Finally, stir in the sliced figs, raisins (reserving a small amount of figs and raisins for topping), chopped apples, orange and lemon zests. Combine well. Pour into prepared pan, and then top with fig reserved slices, being careful not to push them into the batter. Sprinkle with reserved raisins.
Bake for 50-60 minutes, or until browned and set. Let cool for 30 minutes. Run a knife around the edge of the pan, and loosen. Remove cake to a serving platter and sprinkle generously with powdered sugar right before serving.
Notes
You can use white cornmeal instead of yellow if you prefer.
You can add the figs and raisins to the dry ingredients mixture and stir until coated with flour before adding the wet ingredients. It will prevent the fruit from sinking to the bottom of the cake.
Wash the citrus with warm water, especially if they're not organic.
For an intense citrus flavor, double the amount.
Soak the sliced figs and raisins in water or rum to soften. You can omit raisins entirely if you don't like them.
For easier cake removal, line the pan with parchment paper.
Use whole or reduced-fat milk (see FAQs in the post for a vegan version).
I used Honeycrisp apples, but Golden Delicious or any other sweeter variety will work.
Take it easy on the portion sizes as the cake is quite dense and satisfying, with a texture similar to bread pudding.
Serve warm, with powdered sugar or with whipped cream.
Store in the refrigerator for up to 3-4 days.
Please keep in mind that nutritional information is a rough estimate and can vary significantly based on the products used and serving size.