Using a sharp knife, cut both ends off the plantain for easier peeling. Slit a shallow line down the long seam of the plantain, cutting only as deep as the peel. Remove the peel. Slice the plantains horizontally into 4-5 pieces, depending on the plantains. You can either fry or bake the plantains.
To fry: Heat a large cast-iron skillet with ½ inch of oil on medium-high heat until hot but not smoking. Fry the plantain in batches, turning once, until lightly browned, about 5 minutes. Avoid overcrowding the pan (the plantains will absorb excess oil and become soggy).
Use a slotted spoon to transfer the fried plantains and drain them on paper towels.
To bake: Spray a baking sheet with oil and place plantain slices on it in a single layer. Spray plantains lightly with canola oil and bake at 400℉ (205℃) until slightly browned (12- 20 minutes), turning the slices over after 8 minutes.
Heat 1-2 tablespoons of oil in a skillet, and saute the onions, garlic, cumin, smoked paprika, cayenne, oregano, and coriander for about a minute.
Then add the bell pepper and tomatoes or tomato sauce, and bring to a simmer. Add the ground meat and beans, and cook for 7-10 minutes, while stirring frequently to prevent burning. Add broth or water as needed. Season with salt, chicken bouillon, or sazon and black pepper.
Finally, add olives, green onions, and parsley, and adjust seasonings to taste. Remove from the heat and set aside.