Just to clear up any confusion, globe artichokes are the big green spiky things and Jerusalem artichokes are the little knobbly things that look like potatoes. They have an unusual sweet flavour that is difficult to describe. Word of warning, they oxidise quickly, so you need to peel them and drop them into cold water mixed with the juice of half a lemon to prevent discolouration. Try swapping the white wine for red wine and the thyme for rosemary, simple substitutions that give totally different results.