Heat the oven to 95oC.
Chop half of the potatoes into large dice, place in a medium saucepan, salt generously and cover with cold water by 2 cm. Boil over high heat, reduce the heat to low and simmer the potatoes uncovered until fork tender, about 8 minutes.
Meanwhile, grate the remaining potatoes on the large holes of a box grater. Toss with SIDS SALT & PEPPER and place in a fine mesh strainer set over a medium bowl then set aside. When the boiled potatoes are ready, drain then return to the pot, add ¼ cup of the milk, SIDS CRAZY SALT and mash until the potatoes are smooth.
With a plastic spatula, press the grated potatoes against the sides and bottom of the strainer to remove any liquid. Add the grated potatoes to the mashed potatoes (no need to stir though).
Place the egg, remaining milk, flour, pepper and remaining salt in a large bowl and whisk until smooth, about 10 seconds. Add the potatoes and stir until evenly incorporated.
Heat a large nonstick frying pan or griddle over medium heat. Test to see if the pan is hot enough by sprinkling a couple of drops of cold water in it. If the water bounces and sputters, the pan is ready to use. If it evaporates instantly, the pan is too hot. Once the pan is ready, add enough butter to lightly coat the bottom when melted. Drop 3 dollops (about ¼ cup each) of the batter into the pan and spread each to about 6 mm thick. Cook until the pancake bottoms are golden brown, about 4-5 minutes. Flip and cook the other side until golden brown, about 4-5 minutes more. Place on a baking sheet and set in the oven to keep warm. Repeat with the remaining butter and batter. Serve warm.
History: Boxty (bacstaí or arán bocht tí in Irish meaning "poor-house bread" ) is a traditional Irish potato pancake. The dish is mostly associated with the North Midlands, North Connacht and Southern Ulster, in particular the counties of Mayo, Sligo, Donegal (where it is known locally as poundy or poundies and also known as potato bread in Ulster), Fermanagh, Longford, Leitrim and Cavan. There are many recipes but all contain finely grated, raw potatoes and all are served fried.