Hoppelpoppel is a traditional dish originating from Berlin. The dish is usually made with a combination of boiled potatoes, butter or olive oil, onions, bell peppers, eggs, milk, parsley, and pork loin or salami. This popular way to use leftovers is made in a skillet – the potatoes, vegetables, and meat are fried in butter or olive oil, and the eggs, parsley, and milk are poured over the mixture until the eggs are set but still moist.