Preheat your oven to 400°F and line a rimmed baking sheet with parchment paper for easy cleanup.
Slice the jalapeño peppers in half lengthwise and use a small spoon to carefully scrape out the seeds and membranes.
In a medium skillet over medium-high heat, cook the ground turkey until browned and fully cooked, breaking it into small crumbles as it sears.
Transfer the cooked turkey to a mixing bowl and stir in 2 tablespoons of Greek yogurt, the Neufchatel cheese, garlic powder, and onion powder until well combined.
Spoon the turkey mixture into the jalapeño halves, pressing down firmly to pack the filling.
Place the stuffed peppers on the prepared baking sheet and sprinkle the almond flour evenly over the tops, followed by the sea salt and black pepper.
Bake for 15 to 18 minutes until the peppers are tender and the almond flour topping has turned a light golden brown.
While the poppers bake, whisk together the remaining 0.25 cup of Greek yogurt, fresh dill, fresh chives, and lemon juice in a small bowl to create the zesty ranch dipping sauce.
Serve the warm poppers immediately with the chilled ranch sauce on the side.