Welsh Rarebit

225g strong-flavoured cheddar, Caws Llyn
25g butter, melted
1 tbsp Worcester sauce
1tbsp English mustard
1 tbsp flour
4 tbsp Brains beer
4 slices wholemeal toast
Cayenne pepper

Grate the cheese and mix the remaining ingredients to a firm paste. Spread over the 4 slices of toast and grill gently until the topping is cooked through and well-browned.