Coffee Burgers with a Smoky BBQ Sauce

Ingredients

• 750g minced beef (non-lean)
• 1 small red onion, roughly chopped
• 2 garlic cloves, crushed
• 1 egg
• Salt
• freshly ground black pepper
• 4 fresh hamburger bread rolls, sliced
• Cheddar cheese, sliced
• Red onion, sliced
• Wild rocket leaves
• 2 Tbsp coffee, ground
• 1 Tbsp sugar
• 1 tsp Spanish smoked paprika
• 1 tsp mustard powder
• 1 tsp garlic powder
• 1 tsp ground ginger
• 1/2 tsp chilli powder
• 1 Tbsp freshly ground black pepper
• 3/4 cup tomato sauce
• 1/3 cup beef stock
• 2 Tbsp Worcestershire sauce
• 1/2 tsp Spanish smoked paprika
• 1/2 tsp mustard powder
• 1/2 tsp hickory liquid smoke (optional)