Fresh Horseradish is by the other root veggies in the produce department. I couldn't find it anywhere but at the regular grocery. I tried Whole Foods, Trader Joe's, the Coop. Maybe it was time of year though - I don't know when it's in season
It looks like a really thick parsnip with a wierd shaped end. For me, it was the most expensive ingredient in the tonic
I have another brew going - it will be done Sunday