1. Wash the steak and pat it with the back of the knife. Then add black pepper, oyster sauce, five spice powder, sugar and soy sauce. Marinate for 2 hours. It's better to put it in the refrigerator overnight, so it tastes better;
2. Turn over the steak several times in the middle, and then add onion slices together before entering the oven and marinate for 1 hour;
3. Spread a thin layer of oil on the baking tray, spread the pickled onion on the bottom layer, put on the steak, and then put in the cut tomato;
4. Put it in the oven and heat it up and down at 200 degrees for 10 minutes