Caramel Prepare Easy Creamy Caramel Sauce according to directions, boiling for the full 5 minutes. Set aside.
Crust Line a 9x13 baking pan with parchment paper all the way up the sides and lightly spray with nonstick cooking spray. In a medium bowl, mix together crust ingredients (flour through cinnamon). Press into the prepared pan and bake 15-18 minutes or until lightly browned then cool crust (you can place in the refrigerator).
Apples While the crust is baking and cooling, add all of the Apple Layer ingredients to a large bowl and toss to evenly combine. Set aside.
Toffee and Pecans: Top cooled crust with 1 cup prepared caramel sauce then sprinkle with 1/3 cup toffee bits and 1/2 cup chopped pecans. Refrigerate remaining caramel. Evenly layer apple slices over caramel/toffee/pecan layer.
Cheesecake: Beat cream cheese and 1/2 cup sugar on medium speed for 3-5 minutes until light and fluffy. Beat in egg until incorporated, then add sour cream, lemon juice and vanilla and mix until well incorporated. Pour over apple layer and spread evenly.
Streusel: In a medium bowl, mix together flour, brown sugar and oats. Cut in butter until crumbly. Stir in pecans and toffee bits. Sprinkle over cheesecake layer.
Bake at 350F degrees for 25-30 minutes or until filling is set. Let bars cool in pan on a wire rack for 1 hour then refrigerate for at least 2 hours. Optional: Caramel can be drizzled on bars before they are placed in the refrigerator OR can be heated in the microwave and drizzled over before serving.*
To cut, easily remove the cheesecake bars from the pan by lifting out the parchment paper.