Preheat the oven to 400 degrees F. Chop all the vegetables; onions, tomato, potato (make sure it is not too big), soak the potatoes, and set aside.
In the same pan (oven-proof pan) with about 2-3 tablespoons oil, making sure the oil coat all the edges of the pan. Saute the onion for a few minutes, add tomatoes, green onion, ginger, and garlic, and cook for a couple of minutes.
Add the soaked diced potatoes (make sure they're small) and combine, season the ground beef with salt and pepper, if you desire to use seasoning powder/cube, add some and gently mix. Form small balls then add to the potatoes mixture and cook for 2-3 minutes.
Layer the fried plantains over the mixture. Place the pan in the preheated oven and cook until fully cooked. When you press the top with a spatula, and it is firm no egg leaks that means it is cooked.
Leave for about 5-10 minutes before slicing.
Serve and enjoy!