Preheat the oven to 400°F. Line baking sheets with foil and coat with cooking spray or oil.
Using a sharp knife, cut both ends off the plantain. This will make it easy to grab the skin of the plantains. Slit a shallow line down the long seam of the plantain, peel only as deep as the peel. Remove plantain peel by pulling back.
Place plantains on tray and lightly spray, bake for a about 15, turn and bake on the other side for another 15 minutes or until golden brown and tender.
While the plantains are baking, add 2 tablespoon of oil to a sauce pan, followed by onions, garlic and tomato sauce. Let it simmer for about 10 minutes, stirring frequently to prevent burning, add about ½ cup of water if needed.
Then, add ground meat and continue cooking for about 10 or more minutes.
Finally add green pepper and parsley, adjust for seasoning
Remove baked plantains from oven cool for a couple of minutes, make a horizontal slit in the plantains, stuff with equal amounts of meat mixture
Sprinkle with cheese, if desire place in oven and bake for an additional 5 minutes. Serve warm