In Instant Pot, add water and place trivet inside. Place frozen ground beef on top.
Close the lid, set pressure vent to Sealing and press Pressure Cook on High or Manual.
Cook ground beef:15 minutes for thawed - when you open the pot, meat will look cooked and brown outside. But once you remove it into the bowl and start breaking with a fork, you will see that it is red/pink inside. 25 minutes for fully cooked.
After wait 5 minutes, then do Quick Release by turning sealing valve to Venting position.
Open the lid and remove trivet with meat into a bowl. Using forks, meat claws or flat spatula, separate into crumbles. Proceed using thawed ground beef in any recipe.
Notes
Store: Refrigerate in an airtight container for up to 5 days and then use when ready.
What amount can I cook at once? You can cook up to 2.5 lbs at a time.
Can I cook without the trivet? Unfortunately not.
How to peel off the pad from frozen meat? To remove plastic pad, run frozen meat where pad is attached under warm water for a few seconds. With paper one, just cook meat with it and then it peels easily.