Beef burger with grilled onions and smoked cheddar – Andy Cooks

Ingredients

• 1kg (35 oz) 80/20 beef mince
• 1 large brown onion, sliced thick
• 2 tomatoes, sliced
• 200g (7 oz) smoked cheddar cheese, sliced
• 12 slices bread and butter pickles
• 2 tbsp wholegrain mustard
• 4 tbsp mayonnaise
• 1 head of baby gem lettuce, washed
• 8 rashers streaky bacon
• 4 sesame seed buns
• 1 tbsp butter