Pork

Preheat oven to lowest setting to keep warm
Peel 4 potatoes; grate 2 and squeeze out the liquid, cut remaining 2 into chunks, boil until tender, mash and mix with spring onions and plain flour
Whisk the egg white until it holds soft peaks, fold in the milk and bicarbonate of soda, then fold into the potato mixture
Heat a large non-stick frying pan, add butter and vegetable oil, spoon potato mixture into the pan and cook 3–5 minutes each side until golden, keep warm in the oven and add more butter and oil between batches
Heat grill to medium and fry the cherry tomatoes in butter and oil until softened
Grill the bacon and keep warm
Stack the boxty with bacon and egg and serve with the tomatoes