Haggis is a traditional Scottish dish eaten on Burn's night, an annual celebration to remember a famous Scottish poet. As with any dish, there are many different recipes; haggis for example, may be made with beef, but traditionally it is made with lamb. The customary ingredients include sheep's stomach, and the heart and lugs of a lamb. It is mixed with onions, oatmeal, and different herbs and spices. Apart from the spices, all these ingredients are found in Scotland, but nowadays many imported ingredients are used as well. Haggis is difficult to make, so it is usually prepared by a butcher or chef.