Directions
- WHISK egg in small bowl until frothy and yolk and white are completely combined; set aside.
- SET a bowl over pan of simmering water or in double boiler. Combine beer or milk, butter, mustard and cayenne.
- WHISK in cheese gradually after butter is melted. Continue stirring until cheese is melted and mixture is smooth.
- WHISK in beaten egg and continue stirring for several minutes until mixture has thickened again (do not allow it to boil or it will separate).
- TOAST bread. If desired, top each toast with tomato and bacon. Spoon rarebit over the top.