Toss apples in lemon juice then in cinnamon sugar mixture. Spread in 9-inch pie dish.
In another bowl, stir together brown sugar, flour and oats. Using hands or fork, cut in butter until pea size crumbs form. Sprinkle evenly over apples.
Bake 40-45 minutes until mixture is bubbling and golden brown. Remove from oven and let cool 15 minutes.
In small pot, whisk caramel, salt, orange zest and orange juice until warm.
Spoon apple oat crumble over large scoop vanilla ice cream and top with salted citrus caramel.
