Place all the ingredients for spice paste in a food processor and process into a paste. Add a bit of water to get it going if needed
Rub the beef with the marinade and let it marinade for 30 minutes. Place the beef in a medium size pot. Add in water just until it barely covers the beef and let it cook for about 45 mins to 1 hour or until the beef is tender but not falling apart
Remove the beef from the pot and let it cool down a little bit. Thinly sliced across the grain. Use a heavy object (I use a pestle) to pound the meat to about 1/4-inch thick
Preheat a small to medium non-stick pan with about 1 Tbsp of oil. Pan fry the beef slices until they are lightly brown and dry. Serve with sambal