Devilled kidneys were a staple of the Victorian English upper-class breakfast buffet. These days, we would probably view them as too heavy for breakfast - but you could probably get away with sneaking some into a Full English. The 'devil' in the name comes from the heat of the sauce. To be honest, it's not usually fiery like some curries can be - we're talking cayenne pepper, English mustard and Worcestershire sauce, so it's gently warming rather than lip-numbingly potent.
Knob of butter or lard for sautéeing. Salt and ground black pepper to taste. 2 slices of nice crusty bread per person.