1, use the back of the knife to tap the beef tenderloin and then evenly sprinkle salt, sugar, black pepper and rub it into the meat with your hands to marinate for 40 minutes.

2, take sugar, oyster sauce, tomato sauce, butter, onion, black pepper, salt and garlic paste, put onion and garlic paste in melted butter and sauté, then put salt, sugar, oyster sauce, tomato sauce, black pepper and water, simmer for 5 minutes.

3, marinated steak sprinkled with a little bit of cornstarch, hot pan in the butter, put the steak and turn and fry, cooked, remove and drizzle with sauce.