This is very easy to make, mostly in one bowl.  Very moist and the caramel sauce is divine!

For the cake:

10 tbsp butter, melted and cooled, plus 2 tbsp for the apples
1 1/4 cups of flour
1 tsp baking powder
3/4 tsp Kosher salt (not regular table salt)
1 cup sugar plus 2 tbsp sugar, divided
Zest of a lemon
3 large eggs
4 firm apples (you can mix varieties too) peeled, cored and thickly sliced

Preheat the oven to 350 F
Butter and flour an 8” cake pan (It’s easier to use a spring form tin)

Mix the flour, baking powder and salt in a small bowl. In a large bowl, mix the eggs, sugar, 10 tbsp of melted butter and the lemon zest.
Add in the dry ingredients and mix well to form a batter.
In a heavy medium skillet, heat the 2 tbsp of butter and add in the apple slices.
Sprinkle with 2 tbsp of sugar and cook for about 8 to 10 minutes on medium heat until the apples are juicy and caramelized.
Keep stirring, so the apples don’t stick.
Lay half the apples on the bottom of the prepared cake pan and spoon half the batter over them.
Don’t worry if the batter doesn’t completely cover the apples.
Layer with the rest of the apples, then the rest of the batter.
It’s easiest if you have a rubber spatula to spread the batter.

* It’s nice to sprinkle the cake with some cinnamon sugar before putting into the oven.

Bake in a preheated oven at 350 F for 35 to 45 minutes, testing with a toothpick for doneness.

Salted caramel sauce

1/4 cup water
1/2 cup sugar
1/2 cup cream
3 tbsp butter
1/2 tsp Kosher salt (not regular salt)

In a small, heavy saucepan, heat the water and sugar on medium boil until turning golden, about 8 to 10 minutes.
You can scrape the brown bits on the sides of the pan down with a wet pastry brush. Take the golden liquid off the heat and carefully add in the cream. It will bubble fiercely, so be very careful not to splatter yourself.
Place back on the stove and stir for 2 minutes.
Add in 3 tbsp butter and salt and cook for another minute or two until the butter and mixture is nice and smooth.

Transfer to a heat resistant vessel, and place in the fridge to cool. You can make the caramel sauce 5 days in advance