Preheat oven to 425 degrees. Line a cookie sheet with parchment paper (or use a lightly oiled cookie sheet). 

Place the turkey, onion, carrot, spinach, eggs, parsley, bread crumbs and salt and pepper to taste in a large bowl. Gently mix the ingredients to distribute them evenly. Shape the mixture into meatballs about 1-1/2 inches in diameter. 

Roll the meatballs in the Panko. 

Place the meatballs onto the prepared cookie sheet. Bake for 18-20 minutes or until cooked through.