This turned out great but wasn't quite right. The sumac berries were awesome! They have a tart but mild flavor. I found out about these while perusing a Penzey's catalog (1-414-574-0277). Bought them out of curiousity and use them regularly now. The rub does need another flavor though, I think I could get rid of the basil. Next time I'll try a little coriander or thyme and some white pepper. I also plan on creating a version of this rub for chicken.