Pull the husks from the water one at a time, patting dry. Lay skinny side pointing toward you. Spread a tablespoon or two of plantain mixture over the top of the husk in the center. Spoon a tablespoon of meat over the plantain mixture, then fold the skinny part of the husk up over the top of the fillings to cover it, and then roll the husk from left to right, leaving the top open. Pull a thin strip off one of the husks to make a string. Tie the rolled tamales closed with the string to hold them together. Once they are all stuffed, rolled and tied, put about a half inch of water into the bottom of the Instant Pot. Put the steamer rack into the pot. Stand the tamales up on the rack. Cover and set the pot to “steam” for 15 minutes. Once the time is up, pull one tamale out and unfold it to see if the filling is firmed up and not mushy.
To serve, heat the salsa verde, open the husk on a tamale and spoon sauce over it.