Add the pumpkin puree, softened cream cheese, egg, sugar and pumpkin pie spice to a measuring cup or bowl.
Mix these ingredients until combined completely. (Considered using a hand mixer to really break down the cream cheese and get a frothy batter...I tried with just a whisk for the first one and it didn't quite do the trick, a mixer is really preferable).
Spray a ramekin and pour the cheesecake batter in.
Place the ramekin in a microwave and heat for 90 seconds on full power.
Immediately transfer the cheesecake in the ramekin to your refrigerator and cool for 15-20 minutes (or longer if you want a really cold dessert).
Take out of the fridge and place a small plate on top of the ramekin, then flip upside down, inverting the cheesecake onto the plate.
Serve with whatever toppings make your little heart happy! My heart loves caramel sauce, chopped pecans and whipped cream...with a big cup of coffee on the side! :)