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