melt coconut oil in oven proof skillet, add apples and cook until soft. Preheat oven to 350. In a large bowl, combine eggs, oil, maple syrup, vanilla and lemon juice. Whisk until smooth and blended. Combine dry ingredients and add to wet. Mix to incorporate. Let set for 2-3 minutes and mix again. Pour batter over apples in the skillet and place in oven. Bake for 20-25 minutes, until cake is golden brown and set on top