Add fruit and sugar to the Instant Pot and stir. Allow them to marinate for an hour or until the fruit is juicy.
Add in fresh lemon juice and mix well
Cover and lock the lip and pressure cook or use the manual button and adjust the timer to 1 minute. When the timer beeps, allow the pressure to naturally release until the float valve drops. This takes approximately 15 minutes - then unlock the lid.
Using a potato masher or blender, blend the sauce until the desired consistency.
Press the Saute button on the pot and boil for 5 minutes or until the sauce reaches the desired gel state. Skim off and discard any foam.
Canning the Topping
Ladle into hot, sterilized glass containers or jars, leaving 1/2" headspace.
Seal the containers or jars following the instructions that came with your canning jars.
Allow to the sauce to cool and then serve. Store remaining mixture in an airtight container with a tight-fitting lid for up to a couple weeks in the refrigerator.