Ah, the noble turkey loaf! It's just as good as the regular "meat" loaf (turkey's still meat, folks!) but makes people feel a bit better on the health front. Here, we're mixing the turkey with spinach, garlic, and Parmesan, adding flavor and complexity, and then we top with marinara and more Parmesan. The resulting loaf is moist, delicious, and perfect for a weeknight dinner.