1. In a glass baking dish, whisk together the garlic, white wine, lemon juice, soy sauce, olive oil, savoury seasoning, salt and pepper. Place swordfish steaks into the marinade, and refrigerate for 1 hour, turning frequently.
 
2. Preheat barbecue for high heat, and lightly oil cooking grate.
 
3. Barbecue swordfish steaks for 5 to 6 minutes on each side. Garnish with parsley and lemon wedges.