* How to cook
1. Cut the beef into squares, then marinate the meat with 1 tablespoon of fish sauce, 1 tablespoon of oyster sauce, 1 tablespoon of cooking oil and a little pepper, mix well and marinate for 20 minutes
2. Peel the pineapple, cut into small pieces and add a little salt, soak for 5 minutes to remove excess water
3. Add oil to the pan, heat it up and add the beef and stir-fry until the meat turns rare, then add the pineapple and stir-fry together
4. Stir well to mix the beef and pineapple together, then sprinkle a little ground pepper on top and it’s done”