Heat oven to 350F degrees. Grease a 6-inch springform cake pan with a tiny bit of olive oil.
In a medium bowl, place the olive oil, honey, egg, vanilla and salt and mix to combine. Stir in almond flour, sugar, cinnamon, baking powder and baking soda until well combined. Stir in apples.
Spoon batter into the greased pan, spreading it evenly and smoothing the top. Shake the pan to ensure there are no gaps in the batter.
Bake on the center rack of the oven for 45-50 minutes, or until a toothpick or cake tester inserted in the center of the cake comes out clean.
Remove the cake from the oven and allow it to cool to room temperature.
To serve, run a knife around the inside edge to release the cake from the edge of the pan, unlock the outer ring, and open the pan up. Cut cake into 6 pieces (or even 8 pieces if you have light eaters), put on plates and dust with powdered sugar for garnish.
Serves 6.
To store: Wrap it in plastic wrap and then foil after it's cooled, and freeze for up to a month.
