This is how I started the TWD recipe this month and I hope I got the right root !! We call them American Potatoes (I know they are all American ...). No way we could find them canned so I steamed IT in the pressure cooker and mashed it well.
I confess these are the first biscuits I've ever made and eaten so I didn't know what to expect... I liked them warm (no butter please ! from my fattening body) but I tasted to much the metallic aftertaste of the Italian Baking Powder !