Measure out 1 pound of dates. Remove and discard the pits and then roughly chop the dates.
Pour 1 cup of water into the instant pot and place a trivet (the one that came with your pot) inside.
Add the chopped dates to an oven-safe bowl and top with ghee. Place the bowl on top of the trivet.
Secure the lid, close the pressure valve, and cook for 15 minutes at high pressure.
Quick-release pressure.
Remove the bowl from the pot and, using a fork, mash the dates really well, until it looks like a thick paste.
Add the cardamom, chopped pistachios, chopped cashews, sliced almonds, and mix well.
Dump the date mixture out onto a silicone mat and then use the silicone mat to roll it into a log.
Place in the fridge for 2 hours or until firm (I leave it on the silicone mat and put the whole thing in the fridge).
Once firm, cut into ½ inch thick slices.