Choose a piece of beef with good grain, I choose steak meat. Cut the beef into 1.5cm side length equal size.

Scratch it with salt, freshly ground black pepper, and moderate salad oil, and marinate for 20 minutes.

Use the time of marinating the meat to make the secret black pepper sauce.

Half an onion chopped and minced, prepared ketchup, Sriracha, freshly ground black pepper.

Take a small skillet on low heat. Add a good amount of salad oil and when the oil is hot, pour in the chopped onions and saute. The oil should be a little rich. Add freshly ground black pepper to the chopped onions, the more you add the more flavorful it will be, and of course it will be a bit spicy.

Continue to add the tomato paste and mix well.

Add the Sriracha, the purpose is to tone down the color, so 1/4tsp is enough. Continue stirring over low heat and add more black pepper as appropriate.

Stir-fry and then serve in a small bowl and set aside.

Cut the colored peppers into chunks, shred the other half of the onion and set aside.

Take a larger pan over medium heat and add a little salad oil. I used the fat from the steak meat, and the butter will be very flavorful when browned. Add the shredded onion and quickly sauté for flavor, serve, and set aside.

The pan poured into the colored peppers, quickly stir-fry can be served, to be used.

On the same pan as before, with enough oil left in the pan, add the diced beef and saute over low heat. Until browned on all sides, keep rolling, do not paste.

Reduce the heat to medium, pour in the black pepper sauce, and toss to coat.

Add the shredded onion and toss to coat.

Add the red and green bell peppers cut into chunks and continue to stir-fry, add some freshly ground black pepper, a pinch of salt to taste, and sauté.

Open another stove, put the iron plate on it, heating on low heat for 3 minutes, hot, quickly fried beef grains into the iron plate, you will hear a wonderful "bared" sound, careful end of the iron plate, put it on a tray, the top continue to grind some black pepper, can be served. Black pepper, can be served.