Firstly, mill the flour for the cheesecake filling. It will only be a very small amount. I like to use soft white wheat for this. Set aside until ready to put it in the mix.
To a stand mixer (or mixing bowl with hand beaters) add very soft cream cheese and sugar. Beat until it is smooth, scraping down sides as needed.
Then, add eggs, one at a time, blending between each one until smooth. Scrape down sides as needed to evenly blend.
Next add the sour cream, and mix until smooth.
Zest the lime, and then add that to the mixture, along with the lime juice, vanilla, flour, and salt. Mix until all incorporated. (If making a classic cheesecake, skip the zest, and use lemon juice instead of the lime juice.) Again, scrape down sides as needed.
Get the crust out of the freezer, and pour this cream cheese mixture into the prepared crust. (It will rise a bit during cooking.)
Pour 1 cup of water in the bottom of the pressure cooker pan. (If using an 8 qt, you may need 1&1/2 cups of water at the bottom.)
Using the sling & trivet, place cheesecake pan on the trivet and lower it into the pressure cooker. It should not be touching the water, if it is, remove some of the water at the bottom of the pressure cooker.
Make sure the sling handles don't fall into the cheesecake mixture.
Then, lock the lid onto the pressure cooker, and make sure it is in the sealing position.
Press Manual cook on High, and pressure cook for 25 minutes. Make sure the Keep Warm setting is off.
Once the pressure cooker is done, turn it off, leave the lid on, and let is slow release for about 20 minutes. Then, remove the lid, and carefully pull the cheesecake out, using the sling. (There may be a little water on top of the cheesecake, this is normal, just leave it and it will absorb back into the cheesecake.)
Place the cheesecake on a cooling rack, and cool for 30 minutes before placing it in the fridge.
After it cools a bit on the counter, place the cheesecake uncovered in the fridge for hour.
Then, cover with foil, and let it continue to cool covered for at least 1 more hour, or overnight for best results.
Once chilled completely, run a thin plastic knife or tiny spatula around the edge of the cheesecake.
Then, unlatch the springform pan, and reveal your beautiful cheesecake. While still cold, remove metal bottom from pan, then transfer to a plate or serving tray, and it is ready to enjoy!