Complex sentence: It was traditionally boiled in a large pot covered in water, not unlike Scottish Haggis, but it can also be baked or broiled until browned or split, then it is drizzled with butter before serving.
Split into simpler sentences: It was traditionally boiled in a large pot covered in water, not unlike Scottish Haggis. But, it can also be baked or broiled until browned or split, when it is drizzled with butter before serving.