Scotland is responsible for a fair few of Britain’s more unusual foods (here’s looking at you, battered, deep-fried Mars Bar), but this one might just be the most divisive. The country's national dish is traditionally made from sheep’s pluck (minced heart, liver and lungs), which is combined with oatmeal, onions, suet and spices and cooked in a sheep’s stomach. Served with neeps and tatties (mashed turnips and potatoes), it's an essential part of Burns Night celebrations, when the haggis itself is serenaded with Robert Burns’ famous poem, Address to a Haggis.