In a bowl, mix dark soy sauce, olive oil, and The Gourmet Collection Adobo Olé spice blend.

Rub the mixture over the beef rump steaks and marinate for at least 30 minutes, preferably overnight.

Season with salt and pepper, then grill on a hot BBQ or in a pan for 3–5 minutes per side, or until cooked to your liking.

Cook the halved onions on the grill alongside the steak until soft and slightly charred.

Rest the steak for 5 minutes, then serve with the grilled onions.