Italians eat lentils to bring good fortune, linking their round shape with gold coins. No wonder: at 20¢ per 1⁄2-cup cooked serving (of brown lentils), these peppery little legumes practically put money in your pocket. (Brown are the most widely available, but you may also find French green “Le Puy,” orange or black.) A serving contains over 9 grams of protein and a jaw-dropping 8 grams of dietary fiber, making them a boon to heart health as well. Plus, they taste great.