Begin by preheating your oven to 400°F (200°C). This allows the meatballs to cook evenly and develop a lovely golden color.
Line a baking sheet with parchment paper. This will help prevent sticking and make clean-up a breeze.
In a large mixing bowl, combine the ground turkey, sun-dried tomatoes, kalamata olives, minced garlic, feta cheese, fresh basil, sea salt, and black pepper. Drizzle the avocado oil over the mixture.
Using your hands or a cooking spoon, gently mix everything together until just combined. Be careful not to overmix, as this can make the meatballs tough.
Using your hands, form the mixture into meatballs, about 1 to 1.5 inches in diameter. Place them evenly spaced on the prepared baking sheet.
Place the baking sheet in the preheated oven and bake for 20-25 minutes or until the meatballs are cooked through and slightly browned on the outside.
Once cooked, remove the meatballs from the oven and let them cool for a few minutes. Serve them warm, garnished with additional fresh basil or feta cheese if desired.