Whizz together the beans, beef, bread crumbs, spring onions, onion salt chilli powder, garlic powder, onion powder and egg in a food processor. Blitz well till all ingredients combine well.

Divided the mixture into 4 equal portions, then use your hands to form into burgers.

Heat a griddle pan until hot, toast the buns, then set aside. Brush each burger with oil, then griddle for 4-5 minutes on each side.