Preheat the oven to 350ºF. Spray a 9" cake pan with cooking spray.
Beat together the coconut oil and sugar. Once combined, transfer into the baking pan.
Use your hands to spread the mixture out as evenly as possible along the bottom of the pan (it's okay if there are some "holes").
Arrange the apple slices on top of this mixture in any shape or pattern you'd like. Set the pan aside.
In a mixing bowl, beat together the olive oil, honey and eggs. Whisk in the dry ingredients until you have a smooth batter.
Pour the batter into the prepared pan.
Pop the cake in the oven for 25 - 30 minutes, until its golden brown and cooked through (use the cake tester method to check). If it starts to brown too quickly on top, cover it with foil.
Remove the cake from the oven then let it cool completely. Loosen the sides of the cake with a knife then flip it onto a plate. Slice and serve!