Cheese burger recipe | delicious. magazine

Ingredients

• 1 large red onion
• 500g beef steak mince
• 2 tbsp Worcestershire sauce
• Handful chopped fresh parsley
• 80g piece mature Cheddar, cut into 4 equal cubes
• Olive oil, for brushing
• 4 ciabatta rolls, split in two
• 1 Little Gem lettuce, leaves separated
• 2 ripe tomatoes, sliced
• Tomato relish, to serve