Pit Beef Rolls with Tiger Sauce

Ingredients

• 1kg DukesHill sirloin roasting joint
• 3 tbsp salt
• 2 tbsp garlic powder
• 2 tbsp chilli powder
• 2 tbsp ground black pepper
• 2 tbsp smoked paprika
• 2 tbsp onion powder
• 2 tbsp herbs de provence
• 3 tbsp mayonnaise
• 2 tbsp Tracklements wholegrain mustard
• 3 cloves garlic, crushed
• 1 tbsp red wine vinegar
• 1 tsp worcestershire sauce
• 1 tsp white pepper
• 1 white onion, thinly sliced
• bread rolls to serve