Place metal trivet into the pot. Lightly oil a 7-inch springform pan or coat with nonstick spray.
In a large bowl, combine gingersnap cookie crumbs, butter, 1 tablespoon sugar and cinnamon. Press crumb mixture onto the bottom and 1 1/2 inches up the sides of the pan; place in freezer.
In the bowl of an electric mixer fitted with the paddle attachment, beat cream cheese until smooth and creamy, scraping the sides of the bowl as needed, about 2 minutes. Beat in remaining 1/2 cup sugar, pumpkin pie spice, cornstarch and salt. Beat in eggs, one at a time, until well combined. Beat in pumpkin puree, heavy creamy and vanilla.
Remove crust from freezer; pour cream cheese mixture into the prepared pan. Working carefully, gently place the prepared pan on top of the trivet.
Select manual setting; adjust pressure to high, and set time for 28 minutes. When finished cooking, release pressure naturally according to manufacturer’s directions, about 20-30 minutes.
Remove cheesecake and let cool on a wire rack for 1 hour; run a paring knife around the edges. Cover; place into the refrigerator for 6 hours or overnight.
Remove cheesecake from pan; top with whipped cream.
Serve immediately, garnished with pumpkin pie spice, if desired.