Dadiah

Dadiah or dadih (Indonesian and Malaysian Malay) a traditional fermented milk popular among people of West Sumatra, Indonesia, is made by pouring fresh, raw, unheated, buffalo milk into a bamboo tube capped with a banana leaf and allowing it to ferment spontaneously at room temperature for two days. The milk is fermented by indigenous lactic bacteria found in the buffalo milk. Its natural fermentation provides different strains of lactic acid bacteria involved in each fermentation. The natural, indigenous, lactic acid bacteria found in dadiah could be derived from the bamboo tubes, buffalo milk, or banana leaves. Dadiah is usually eaten for breakfast, mixed together with ampiang (traditional glutinous rice krispies) and palm sugar. Dadiah can also be eaten with hot rice and sambal.

Source: Wikipedia