When I lived in a hall of residence at a poly run by Opus Dei in Huelva, near Seville, breakfast was a huge bowl of cheap biscuits, a kettle of hot coffee and a kettle of reconstituted condensed milk. You would fill your breakfast bowl with a 50//50 mix of coffee and sticky sweet milk then pile in a handful of the biscuits, mashing them up into a kind of porridge. It was energy-dense and surprisingly satisfying. One night my room mate and I broke into the kitchen and found the catering-size tin of condensed milk; the tin was seething with ants, which were scampering around on the surface of the milk somehow without getting stuck to it.