Slit dondakayalu into 2 parts.
Do not cut them into pieces, just slit them.
Chop onion.
Heat 1/4 tsp oil in a kadai, add urad dal and fry it.
Add chopped onion and fry till it starts changing colour.
Add red chillis and coriander seeds also.
Keep stirring and fry for a minute.
Before switching off add tamarind and mix again.
Lastly add garlic and switch off the flame.
Keep this masala mixture to cool.
Once the above masala cooled completely, grind it to make coarse paste.
Add fresh coriander leaves also and grind it to make smooth masala paste.
Keep this masala paste ready to use in the curry.
Heat oil in a kadai, add cumin seeds and let them splutter.
Add slit dondakayalu and shallow fry them.
Add turmeric powder and salt. Fry them till they are soft.
Add the above made masala paste and combine it well.
Let the raw smell go off and lastly add some fresh coriander leaves.
Serve dondakaya ulli karam with rice or roti.