Milk going sour, and wizened blueberries? Simple! Beat one egg into 4 oz of plain flour, add ¼ pint of milk (yes, I know the measurements are mixed, but it’s Pete’s recipe), 1½   tsp baking powder, ½ teaspoon cream of tartar, ¼ teaspoon of salt, squirt of lemon juice, two teaspoons of olive…