Smoked haddock and leek rarebit Serves: 2 Ingredients 350-400g smoked haddock 1 large leek, cut into thin rings 75ml dark, strong, malty beer 150g very strong cheddar, grated 1 tbsp plain flour mixed thoroughly with ½ tsp English mustard powder few drops of Worcestershire sauce 3 tbsp double cream 1 egg yolk freshly ground white