Grate the sweet potato using a box grater and squeeze out any excess moisture using a clean kitchen towel or cheesecloth.
In a medium mixing bowl, combine the shredded sweet potato, ground turkey, eggs, sea salt, black pepper, and garlic powder.
Mix the ingredients thoroughly with a fork until the turkey is well incorporated and the mixture is cohesive.
Heat the avocado oil in a large non-stick skillet over medium heat until shimmering.
Divide the mixture into four equal portions, shape into patties, and place them carefully into the hot skillet.
Use a spatula to press the patties down slightly and cook for 5-6 minutes on the first side until a deep golden crust forms.
Flip the fritters and cook for another 5 minutes until the turkey is fully cooked through and the edges are crispy.
While the fritters finish cooking, finely mince the chives and stir them into the Greek yogurt in a small ramekin.
Plate the hot fritters immediately and serve with the chive yogurt dolloped on top.