1. Bring a pot of water to a boil for the plantains. Peel the plantains and slice them in to 2-3 inch long pieces. Once the water is boiling, carefully drop the plantain pieces in and boil for 5 minutes.
2. While the plantains are boiling, place the ground beef in a bowl and add in the onion powder, garlic powder, salt and pepper for seasoning. Mix everything together with your hands to get the seasonings evenly incorporated. Form the burgers into 3 large patties and set aside.
3. Carefully drain the water from the pot. Using the back of a plate or other flat object, smash the plantain pieces into "buns" between two sheets of parchment paper. Using a spatula, set the flattened plantains aside on a plate.
4. In a large skillet, heat the avocado or coconut oil over medium-high heat. Working in batches, fry the flattened plantains until brown a crispy, about 3-4 minutes per side. Season with salt on each side and place the cooked "buns" on a paper towel lined plate. Add more oil as needed to finish cooking all of the plantains.
5. When half of the plantains are cooked, heat another large skillet to medium. Add the burgers and cook for about five minutes per side, or to your desired doneness.
6. Now make up your burgers. Put a bun on a plate, top with a burger patty, add your favorite burger condiments and top it off with another bun. Enjoy.