Guinea fowl casserole with winter roots, pearl barley and parsley pistou

If ever there was a winter-warming dish, then this is it. Accompanied by buttered new potatoes, it makes an ideal family meal. I have suggested making it with baby carrots and button onions, but it is also delicious with other winter vegetables, such as swede and parsnips. The parsley pistou adds a contrasting flavour of the Mediterranean.