Gather the ingredients.
Combine Worcestershire sauce, minced garlic, salt, olive oil, onion powder, and black pepper in a bowl.
Place ostrich steaks on a plate and rub seasoning mixture onto both sides of steaks.
Cover with plastic wrap and place in refrigerator for 2 hours.
Preheat grill to medium-high heat. Remove steaks from refrigerator and let sit at room temperature (covered) for 15 minutes as grill is heating.
Once grill has heated, oil grill grates well.
Place steaks on grill and cook for 5 to 6 minutes per side, depending on thickness, or until internal temperature reaches at least 150 F.
Remove meat from grill and let rest for 5 to 7 minutes.
