Borhani are yoghurt-based drinks popular in Bangladesh. It's traditionally served in wedding ceremonies around the country.
Dry-roast cumin seeds by cooking them over low heat in small pan until you can smell the seasoning, about 2 minutes. Cool and grind.
Beat yoghurt with water until it becomes smooth. Strain green chili, mint leaf and coriander pastes with some water blend into the yoghurt. Combine all other ingredients and mix well. This makes about 6 servings which should be served cold.