Pre-heat the oven to 400 F. Made a horizontal slit on the middle of each plantain.
Place them on a baking sheet and rub them with the butter or oil.
Bake the plantains for about 30 minutes, then turn each one and bake for another 10 minutes or until golden on both sides.
Remove the plantains from the oven and stuff with shredded beef and top with cheese and chopped cilantro. Serve warm.