IF YOU MADE ROPA VIEJA YOU CAN USE THE WATER THAT WAS IN THE PRESSURE COOKER ONCE YOU TAKE OUT THE MEAT. THAT WATER HAS NOW BECOME A BROHT FROM THE MEAT. JUST ADD THE PLANTAINS, COOK FOR 10 MINUTES, AND THEN PLACE IN THE BLENDER USING THE LIQUID THATS IN THE PRESSURE COOKER.