Legumes, and lentils, in particular, may be consumed in Czech culture to ensure wealth, but they're also known to improve your health. A superfood rich in protein, healthy fats, vitamins, and minerals, they're affordable, filling, and have a long shelf life. Historically this has been seen as an advantage -- available year-round, lentils in their unprocessed form keep for up to 6 months in the pantry.