Hutspot ( pronunciation (help·info)) is a dish of boiled and mashed potatoes, carrots and onions with a long history in traditional Dutch cuisine. According to legend, the recipe came from the cooked bits of potato left behind by hastily departing Spanish soldiers during their siege of Leiden in 1574 during the Eighty Year's War, when the liberators breached the dikes of the lower lying polders surrounding the city. This flooded all the fields around the city with around a foot of water.
As there were few, if any, high points (and September in the Netherlands is not exactly a warm month), the Spanish soldiers camping in the fields were essentially flushed out. The anniversary of this event, known as Leidens Ontzet, is still celebrated every October 3 in Leiden and by Dutch expatriates the world over. Traditionally, the celebration includes consumption of a lot of "Hutspot met klapstuk/stooflap" (Hutspot with chuck roast/beef shoulder chops).