Clean and cut the strawberries in half. Place them in the Instant Pot.
Add the sugar to the strawberries and mix everything together until it is well combined. Let it sit in the Instant Pot (with the Instant Pot off) for 15 minutes.
After the 15 minutes, put the lid on the Instant Pot and turn it on high for 1 minute.
Once the Instant Pot is done, allow the pressure to naturally release for 15 minutes.
In a separate small bowl, add 2 tablespoons of cornstarch and 2 tablespoons of water. Mix it together until it becomes a slurry and the cornstarch completely dissolves.
Open the Instant pot lid and add the cornstarch slurry. Mix well and mash any strawberries that you feel are too big.
Turn the Instant Pot on "sauté" and allow the jam to come to a full boil. Cook for 2 minutes until the jam begins to thicken slightly.
Allow the jam to cool slightly and then store the jam.