The best thing I discovered at the Penzey's Spice shop was a thing they call "Bicentennial Rub" It's a dry rub with black pepper, dried orange, sugar, coriander and maybe something else which I don't remember. No salt. I especially liked using it on spareribs. I'm not sure how they prepare the oranges but here's what I've done for lemons: Zest the lemon rind, then squeeze the juice from the lemon onto the lemon zest. Let dry, then crush. I have a gas oven with a pilot light so leaving the lemon in there dries it nicely in a couple of days. (remove while baking) I could also see using a couple of fruits together, maybe use the lemon zest and then add lime juice instead of the lemon juice. What about grinding up apple chips? Signe Shivers