Instructions

1. Heat the oil in a frying pan and gently cook the onion for about 5 minutes until soft. Set aside.
2. Mix together all the ingredients in a bowl, add the cooked onion and season to taste. Add some crushed chilli flakes or chopped fresh chilli if you like the burgers to have more heat.
3. Shape the mixture into 6-8 burgers and chill for 10-15 minutes.
4. Fry, grill or barbecue the burgers for about 5 minutes each side, depending on how well done you like your burger.
5. Cut the buns in half and toast or barbecue them cut-side facing down.
6. Put a lettuce leaf on the lower part, add the burger, topped with a few slices of gherkin & spring onion, then drizzled with sweet chilli sauce. Cover with the upper half of the bun and enjoy!