this is i know it is made.
1. fry onion on oil (be generous on oil) on pressure cooker
2. once oil is golden brown, add meat.
3. fry meat for sometime and add giger garlic ( be generous here)
4. fry more until meat become brown.
5. add meat masala, coriander, cumin
5. fry some more.
6. now, close the lid and let it cook. this is the part that make pakku. slow cook over time without water in it until meat becomes soft.
7. this can also be done by marinating meat first with all the ingredients above and slow cook on a pot.

i have seen my mom cook in both ways.

good luck.