Pure Pumpkin Cheesecake

I am forever grateful that the editors of Fine Cooking magazine encouraged me to create this glorious pumpkin cheesecake. I had feared that the spices usually associated with pumpkin-flavored desserts would fight with the cream cheese, but then I discovered that using turbinado sugar, with its mild overtones of molasses, and leaving out the spices made it possible to enjoy the true pumpkin flavor. Pecans are a time-honored complement to pumpkin, and the addition of a caramel topping