Wash and clean the drumstick flowers. Discard the thick stem and separate the flowers. Keep aside. Next heat a pan adding oil, blackpepper and cumin seeds.
Saute till the cumin splutter, then include the drumstick flowers. Continue sauteing till the flowers wilt. Let it cool down. Transfer these roasted ingredients in to mixer, add coconut and salt too.
Grind them together to fine paste adding water as needed. In a bowl mix it with buttermilk and adjust consistency.
Heat a tempering pan adding ghee, mustard seeds, split black gram lentils and curry leaves. As mustard splutter, pour it over tambli.
Notes
Wash and clean the drumstick leaves thoroughly before using.
You can use green chillies replacing blackpepper.
Fresh buttermilk with a hint of tang is good for tambli.