As we're heading towards autumn again I started to go through my 'Winter Warmers' recipes and thought I should share this one, a warming casserole dish and one pot meal. I found the recipe some time ago in a low cholesterol and low fat cookbook. I usually leave out the celery and add more leek and carrots instead, as I don't like celery. (UK tomato puree = US tomato paste, swede = rutabega and you can use sour cream or creme fraiche instead of the fromage frais, if you can't get any.)