In a very clean bowl, mix the condensed milk with the plain yogurt. Stir slowly until well mixed.
Put a bottom layer of chocolate cookie in a glass baking dish suitable for the Instant Pot®.
Add the yogurt mixture, leaving ⅓” (1 cm) of space before the edge.
Cover with aluminum foil, taking care that it is tightly covered to prevent drops of water from entering when baking.
In the Instant Pot® bowl, add 1 cup of water, insert the rack and place the baking dish on top.
Close and lock the Instant Pot® lid. Make sure the steam release handle is turned to Sealing. Press Cake and set time to 10 Minutes.
When done cooking, press Cancel and turn the steam release handle to Venting. Once all the steam has been released, open the lid. Carefully remove the baking dish.
Let cool and refrigerate for at least 5 Hours. Refrigerating overnight is even better.
When serving, cover with fresh kiwi, or whatever fruit you like.