I usually let my beef rendang simmer for 1 - 1.5 hours to make sure the meat is tender. Eating rock-hard beef rendang is not very pleasurable as you probably can imagine ;)
The combination of Finna and Indofood rendang is not very hot, you should add extra chillies yourself if you like your rendang biting hot!
Serve your beef rendang with rice and salad. And a glass of water (or more) if you finally decided to make your rendang extra hot ;)!