1 medium cauliflower, cut into florets
1 onion, very thickly sliced
陆 small bunch flatleaf parsley, leaves picked and roughly chopped
陆 tsp English mustard
40驳/1陆辞锄 plain flour
sea salt and freshly ground black pepper
录 tsp freshly grated nutmeg
40驳/1陆辞锄 butter
40驳/1陆辞锄 light mature cheddar, grated
600ml/1 pint semi-skimmed milk