CRUST.
Grease a 9 x 13 inches baking dish.
In a bowl combine cracker crumbs, oatmeal, pecans and brown sugar.
Stir in butter.
Press onto the bottom of the baking dish.
Set aside.
FILLING.
In a mixing bowl, beat the cream cheese and brown sugar until smooth.
Add eggs one at a time, beating on low speed, just until combined.
Stir in sour cream, cinnamon and ginger.
Pour over the crust.
Arrange apple slices in rows over the filling.
TOPPING.
Combine flour, oatmeal, pecans, brown sugar, and cinnamon in a bowl.
Cut in butter until crumbly.
Sprinkle over the apples.
Bake at 350°F for 50 minutes or until center is almost set.
Cool on wire rack.
When cool refrigerate.