Start by adding the berries, sugar and lemon juice to the Instant Pot. (Don't worry about the non-liquid, remember the berries are frozen, the water will melt as the Instant Pot heats up)
Add your lid to your Instant Pot, and make sure that the vent is in the sealing position.
Set the time for 1 minute, allow for a natural release. After the time is up.
Use an immersion blender to blend the jam into a smooth consistency.
Then make the cornstarch slurry by mixing the cornstarch and water in a small cup, and then pour it in, this will help your jam firm up.
Push the saute button, and allow for the jam and the cornstarch slurry to heat up, which will help firm up your jam.
Plate, serve and enjoy!