Welsh rarebit

INGREDIENTS
4 slices of white bread or wholemeal bread
25g (scant 1oz) butter
225g (8oz) strong Cheddar cheese
or Lancashire cheese, grated
1 tbsp English mustard powder
3 tbsp brown ale or lager
Worcestershire sauce, to taste

METHOD
Preheat the grill to high and position the rack 10cm (4in) from the heat. Toast the bread until golden brown, then turn over, and toast the other side. Leaving the grill on, remove the toast from the heat, and place on to a baking tray.
Meanwhile, melt the butter in a pan over a low heat. Add the cheese, mustard powder, and ale, and heat until creamy, stirring often.
Spread the sauce over the toast and splash a few drops of Worcestershire sauce on each. Return the cheese-covered toast to the grill for just a few minutes, or until the cheese is bubbling and golden. Cut each slice in half and serve.