Elvis burger with chopped salad & pickled gherkin

INGREDIENTS

• 1 dried red chilli
• ½ red onion, peeled and finely chopped
• 1 sprig fresh tarragon, leaves picked and chopped
• 1 large free-range egg
• 1 handful breadcrumbs
• 1 teaspoon Dijon mustard
• 2 tablespoons Parmesan, freshly grated
• 1 good pinch ground nutmeg
• 400 g beef mince
• oil, for frying
• salt
• freshly ground black pepper
• 1 cos lettuce
• 4 plum tomatoes
• 1 cucumber
• 4 ciabatta rolls
• 4 large pickled gherkins