Chicken & ham casserole with mustardy dumplings Serve mustardy dumplings with our chicken and ham casserole for a comforting and filling family feast. You can freeze any leftovers, too – if there are any! Ingredients 1 tbsp sunflower oil 1 tbsp butter 1 onion, chopped 2 leeks, thickly sliced 2 carrots, peeled and chopped 6 […]