Serves 4 (makes about 12 cakes)
The old Irish rhyme goes
Boxty on the griddle,
Boxty in the pan,
If you can't make boxty,
You'll never get your man.
They must be good! From the Gaelic word bacstai (grilled over fire), the potato cakes called boxty have many versions, including this one, which combines both grated and mashed potatoes, flour, and butter. (Make them with leftover mashed, if you like; you'll need 1 1/2 cups.) Some cooks like to make a stiff batter and drop it into a greased saucepan; another method is a thinner batter to produce one large boxty per person, which is folded omelet-style over meat. You can also knead and shape the boxty into something of a bread dough and cook it on a griddle. The combination of grated and mashed russet potatoes produces a melting and silky texture when the cakes are fried.