Heat the oven up to 375° and grease your cast iron pan or baking dish.
Peel and slice your apples, place them in a medium sized bowl.
Add sugar, spices, and maple syrup to the apples
Pour out on the bottom of the greased baking sheet.
Mix together eggs and sugar until well combined.
Add 1 cup of milk, Grand Marnier, and Vanilla, mix until well combined
Gently stir in All purpose flour and salt.
Pour over the top of the Spiced Apples and place in a hot oven.
Allow to cook for 8 min, then reduce the temperature to 350 and cook for another 30 min or so. The cake is done when a toothpick stuck in the center of the cake come our clean.
Pour caramel over the top, slice and eat.