I'm only 15. Buy i cooked lamb before
Take the beef and put it in the fridge
Then take a basin, put some blackpepper sauce,pounded black pepper,chopped garlic,onions and 1 sauce i forgot
Put the stuff into the basin and put in the beef
Then use your hands and rub it with the stuff in the basin
Take a clean bag, pour all the stuff into the basin including the beef
Leave it in the fridge forr atleast 5 hours. The longer the better
I usually do it 24 hours. Then take the beef out and grill
You are done. Can eat with other stuff also
Try it out with normal beef in small amounts
Then controll the ingredients and get the taste you want