Season the beef sirloin steak with salt and pepper on both sides.

Heat 1 tsp of salad oil in a pan over medium heat and sear the steak for 3-4 minutes on each side.

Remove the steak from the pan and let it rest while preparing the sauce.

In the same pan, sauté chopped onion, garlic, and mushrooms until softened.

Add red wine, butter, soy sauce, salt, and black pepper to the pan. Simmer until the sauce thickens.

Steam the broccoli until tender and serve alongside the steak.