Method

• 1.
  Preheat the grill to medium-high.
• 2.
  Place mince, tomato paste, egg and breadcrumbs in a bowl, season, then mix well with your hands to combine. Divide into four patties, cover, then chill for 5 minutes. Grill cob halves, cut-side up, for 1 minute or until golden. Turn over and grill for a further 1 minute. Keep warm.
• 3.
  Heat 1 tablespoon oil in large frypan over medium heat. Cook onion for 5 minutes, stirring, until golden. Remove from pan and keep warm.
• 4.
  Wipe out frypan and heat remaining 1 tablespoon oil. Cook patties for 4 minutes, then turn and cook for a further 3 minutes until cooked through. Cover each patty with a slice of cheese and place under grill for 1-2 minutes until cheese is melted.
• 5.
  Lay lettuce over the bottom half of the cob, then top with the beetroot and tomato slices. Place the cooked patties on top, then the onion, tomato sauce and pickles. Spread the mayonnaise on the top half of the cob, season with sea salt and freshly ground black pepper, then place on top to make a big bad burger. Use a serrated knife and cut into quarters and serve.