Grilled soy steaks in spiced marinade

Ingredients

• 6 big soy steaks
• 1 liter (4 cups) veggie stock
• 250 ml (1 cup) ketchup
• 250 ml (1 cup) bbq sauce
• 2 tbsp maple syrup
• 2 tbsp mustard
• 1 tbsp salt
• 1 tbsp pepper
• 1 tbsp paprika
• 1 tbsp cayenne
• 1 tbsp garlic powder
• 1 tsp steak seasoning
• 1 tsp apple cider vinegar
• 1 1/2 tbsp liquid smoke