In the base of the Instant Pot add the berries and sprinkle sugar over it. Let the sugar rest for 10 minutes.
½ cup Blueberries, ½ cup Blackberries, 2 tablespoon Sugar, 1 cup Strawberries
After 10 minutes, open the Instant Pot and add 2 tablespoon water. Close the lid.
2 tablespoon water
Set the mode of the Instant Pot to 'Pressure Cook', time to 3 minutes and pressure to high. Move the vent to sealing. Let the berries cook till the end of the cooking time. Let the pressure release naturally for 5 minutes and then do a quick release.
Open the lid and add in lemon juice. Mash the jam using a potato masher.
¼ teaspoon Lemon Juice
Set the mode to 'Sauté' and let the jam thicken for 5-6 minutes.
Mix well and let the jam cool to room temperature. As it cools, it will become thicker.
Transfer to and airtight jar and refrigerate. Use as required for up to a week.
The jam can be frozen for months! I like to divide it into silicone molds and freeze in single serve portions. Just pop one and use as you like!
Video
Notes
Note: Nutrition values are my best estimates using an automated calculator. If you rely on them for your diet, use your preferred nutrition calculator.