Mix, pancake mix, oats, eggs, butter, sugar, vanilla, salt and milk on medium speed until all combined.
Peel and slice three apples
Spray a 13X9 pan with baking spray
spread half the batter in the bottom of the pan
layer the sliced apples (reserving a few slices for the top)
spread the other half of the batter
top with a few apple slices.
Bake at 350 degrees for35 minutes or until lightly golden and done when tested with toothpick.