Heat 2 tablespoons of coconut oil in a large skillet, and lightly fry plantains until golden brown on both sides, then set aside.
Heat remaining oil in a skillet over medium-high heat, add onion, garlic, bell pepper, and green seasoning, and cook, while stirring, until onion is soft, for about 2 minutes.
Stir in oregano and cumin, cook until fragrant, for about 1 minute.
Add lentils and tomato sauce, and stir. Cook for about 5 minutes, while stirring so flavors can meld.