Spoon mixture onto plastic wrap in a ball shape. The mixture is wet so it won't quite be a ball but do your best to make a ball or pumpkin shape. It won't be perfect. Wrap mixture tightly with plastic wrap and place in the freezer for 4 hours or until firm. I like to tie a rubber band at the top to hold the plastic wrap tight but it's not necessary.
While the ball is freezing make the gingersnap crumbs. Use a food processor to crumble the gingersnaps or if you don't have a food processor put the gingersnaps in a gallon size bag and roll over with a rolling pin.
Remove the ball from the freezer and unwrap the ball. Let it sit out for about 5 minutes. It will not look perfect but will look fine once the crumbs are on it. This will allow the gingersnap crumbs to stick better to the ball. Place gingersnap crumbs on a large plate or platter. Roll the ball in the crumbs, pressing the crumbs into the ball. Wrap ball in clean piece of plastic wrap and store in the freezer until serving.
Cut into wedges and serve with graham crackers, apple slices, or gingersnap cookies.
If you don't have Pumpkin Pie Spice you can make your own. The substitute for 1 Tablespoon of Pumpkin Pie Spice is: 1 1/2 teaspoons cinnamon, 1/2 teaspoon nutmeg, 1/2 teaspoon ginger, 1/4 teaspoon allspice.
If you want to make a smaller batch cut the recipe in half. It's just as good and better for a smaller group.