To prepare a baked spinach feta and turkey meatballs recipe, you will first need to prepare the ingredients for the recipe. Preheat the oven to 400 degrees Fahrenheit (204 degrees Celsius) and prepare your oven rack to the lowest setting. Place the ground turkey, spinach, and parmesan cheese in the bottom of an oven-proof dish. Pour the olive oil into the dish and sprinkle with the salt and pepper. Bake the mixture for 20 to 25 minutes or until the turkey is no longer pink and the spinach is wilted.