Put the toast before the fire until the cheese is melted.
Season with mustard, pepper, and salt.
Eat the rarebit while hot.
Original Text
No. 164. How to make a Welsh Rarebit.
First, make a round of hot toast, butter it, and cover it with thin slices of cheese; put it before the fire until the cheese is melted, then season with mustard, pepper, and salt, and eat the rarebit while hot.