These chicken breasts stay juicy and tender on the grill because they are first brined in salt water. The chicken is then marinated in lime juice and seasoned with cumin, salt, and pepper. Give this chicken time to brine and marinate and you will be rewarded with lots of flavor and tender, juicy grilled chicken. Another trick for successfully grilling chicken breasts is to slice them in half horizontally and flatten them a bit before grilling them so that they cook more evenly (and more quickly). It's easier to tell when they are done (and to prevent overcooking) when the chicken pieces are all the same thickness. Lime and cumin are a natural seasoning combination, and with a generous amount of salt and pepper, the chicken is delicious on its own. But it would be great served with some kind of spicy salsa like chilean pebre or bolivian llajua, or sliced and served with tortillas and other accouterments like guacamole, sour cream, and cheese.