Hi W - 83 thoughts here as well:
http://www.astray.com/recipes/?search=jerusale m
Lovely veg - but eat on your own-as above - or with the windows open.....soup, mash, fry, bake. saute or roast them. 'Purple' ones are considered the best. Also seasonaly best October to March. Once peeled and to stop them discolouring, add a squeeze of lemon juice to the water you keep them in before cooking.
The 'activity' is due to the amount of unabsorbable carbohydrate in the roots being worked on by bacteria in the gut plus the amount of frusctose present in them too. Just so you know.
I'm sure you know the name comes from the Italian girasole (stress the girasOle when you say it) meaning to turn with the sun, as the plant they come from (its the root you eat) is the sunflower of family North American origin, and yes its follows the sun in the day. ..