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'mashed sweet potato' Sweet potato
most tests on boiled sweet potato show it to have a lowish GI (around 46)
Be careful about baking or roasting it, much higher GI (about 80 for barbecued sweet potato) Boiled parsnips have a similar GI to sweet potato, but I would think that roasting would increase it again. Celeriac
quite low carb2.3g per 100g http://www.jamieoliver.com/recipes/vege ... d-celeriac Jerusalem artichokes
Are on paper higher in carbs (17.46 per 100g ) but the carbohydrate is inulin (not insulin as some websites seem to think)which is not broken down by the body
( NB: they can give some people 'gastric distress' though note the 17th quote in the wiki article http://en.wikipedia.org/wiki/Jerusalem_artichoke )
Slightly different but also sort of comfort foods : chana dahl (also known as Bengal Gram) Very low GI. http://www.mendosa.com/chanadal.html dried lentils ( when rehydrated and cooked about 12g in 100 gm ;cooked weight ) but low GI. (around 26 so lower than sweet potato)