How do you make Siglo Itlog?

To make Siglo Itlog, also known as Century Eggs or Preserved Eggs, you need to preserve the eggs in a mixture of clay, ash, salt, quicklime, and rice straw for several weeks to several months. The alkaline environment transforms the egg whites into a gelatinous texture and gives the yolk a creamy consistency with a unique flavor. After the preserving process, the eggs are ready to be consumed.