Preheat the oven to 400º F. Line a baking sheet with parchment paper.
In a spice grinder or mortar and pestle, grind together the fennel seed and black peppercorns. Transfer spices to a small bowl and add the kosher salt, mix to combine.
In a large wide shallow bowl add the ground turkey bread crumbs, garlic, parsley, and spices. Mix gently with your hands. Add the wine and eggs and mix gently with your hands again to incorporate the eggs into the mixture.
Form into 1-1/2 inch balls weighing about 2 oz. each and place on baking sheet.
Bake the meatballs, rotating the baking sheet halfway through cooking, for about 20 minutes or until browned and fully cooked.
Serve the meatballs with peperonata.