First, heat your oven to 325. For the crust, mix the graham cracker crumbs, chopped pecans, 3 Tablespoons sugar, ½ teaspoon cinnamon, and melted butter. Press into the bottom of a 9-inch springform pan. Bake for 10 minutes.
For the filling, beat the cream cheese, ¾ cup sugar, and vanilla until smooth. Add the eggs and mix just until combined. Pour over the crust.
For the topping, mix ⅓ cup sugar and ½ teaspoon cinnamon. Toss the apple slices to coat. Arrange the apples on top of the filling and sprinkle with the remaining pecans.
Bake 1 hour 20 minutes to 1 hour 30 minutes, or until the center is nearly set. Let cool for 10 minutes, then run a knife around the inside of the pan to loosen the cake before removing the rim.
Refrigerate at least 4 hours before serving. Drizzle with salted caramel sauce if desired.
Notes
Use a firm apple such as Granny Smith or Honeycrisp so the slices hold their shape.