Rihaakuru

Rihaakuru is a tuna-based thick sauce. The color varies from light brown to dark brown. It is a traditional dish of Maldivian cuisine, consumed almost daily in every household in Maldives and in Minicoy since ancient times. Rihaakuru is produced as a by-product of the processing of tuna. Maldivian travellers introduced Rihaakuru and Bondi to Sri Lanka (then Ceylon). Sri Lankans considered these as delicacies and referred to them as Bondi Haluwa and Dhiyā Hakuru (rhyming derivative, of the original Dhivehi term, which means 'liquid jaggery' in the Sinhalese language) respectively. These terms were popular in Sri Lankan households until the latter part of the 20th century, when they gradually disappeared. Rihaakuru is obtained through following a simple but time-consuming procedure. The extract is the result of hours of cooking of tuna in water and salt, while carefully removing the scum (filleyo) that keeps forming. Once the tuna pieces are cooked and ready to eat or store, they will be removed from the water, as well as the bones, heads and fish guts. The pieces of tuna, so cooked, get eventually processed into Maldives fish. The remaining "fish-soup" (Garudhiya) is left with Bondi (balls of tuna scraps scraped off the bones), and is kept boiling in low fire until most water evaporates. The resulting concentrated fish soup becomes a thick paste which is known in Dhivehi as Rihaakuru.

Source: Wikipedia