
Add 1 tablespoon of cheese into the bottom of each the plantain cups. Scoop the picadillo into the cups and press down lightly. Return to the oven for another 5 minutes to heat the beef and melt the cheese.
Loosen the edges of the cups with a knife. Carefully remove the piononos from the muffin tins, it helps to use a spoon or fork. Place the piononos on a serving tray and serve hot.