I bought some roasted chicory root from Sweet Maria's to make Blue Bottle's nola recipe: http://www.bluebottlecoffee.com/preparation-guides/new-orlea...

Throwing some in with iced-tea and ginger flavoring and carbonating was somewhat reminiscent of root beer so I may keep experimenting with it.

The roasted chicory packs a strong punch, so perhaps roasting other roots would amplify their flavor.