Slice beef into bite-sized cubes, set aside.
Soak black nut in water for at least 10 mins, then squeeze between fingers, turning the hot water into black solution, set aside.
Turn onion, garlic, and candlenut into a fine paste, then dump into instant pot, pot
Pour oil and add in the other spices, saute til fragrant. Add in beef, coat nicely, then pour in black solution, stir to combine.
Pour in water, stir.
Turn off saute option, place lid on, click soup option and let the instant pot does its magic!
Serve with warm rice