In a medium mixing bowl, mash the ripe plantain with a fork until it reaches a mostly smooth consistency with just a few small chunks remaining.
Add the ground turkey, garlic powder, onion powder, and half of the sea salt and black pepper to the mashed plantain.
Mix the ingredients thoroughly by hand or with a spatula until the plantain is evenly distributed throughout the turkey.
Divide the mixture into four equal portions and shape them into flat, round patties about half an inch thick.
Heat the avocado oil in a large non-stick skillet over medium heat until shimmering.
Carefully place the fritters in the skillet and cook for 5 to 6 minutes per side, ensuring the turkey is fully cooked and the plantain has caramelized into a deep golden brown.
While the fritters are searing, combine the Greek yogurt, lime juice, chopped cilantro, and the remaining salt and pepper in a small bowl to create the zesty dip.
Remove the fritters from the heat and serve immediately alongside the chilled yogurt dip.