Another great idea that came to us is a method for making very low-fat French fries.  We have used this with potatoes, celeriac and parsnips with great results.  Simply chop your roots into fries.  In a large Tupperware container with a lid mix 2 Tbs olive oil with a teaspoon or so of mustard (vary the amount to you r taste).  Add the fries, close the lid and shake so that the fries are evenly coated with the mixture.  Bake in a 350 degree oven for 30-45 minutes turning the fries over occasionally until the fries are evenly golden brown.