A good spice blend can elevate even the simplest dish, and grilling season is an ideal time to put it to work. Yet many of the premade spice rubs and marinades available at grocery stores are overpriced and loaded with excess sodium, added sugars, and artificial preservatives. Meanwhile, many of us have spice cabinets overflowing with dozens of jars of individual ingredients we rarely touch because we’re just not quite sure how to combine them.