How to make it

  • 1. Blend/pulse mushrooms until fine in a food processor.
  • 2. Cook mushrooms on a griddle or large frying pan over medium heat for about 4 to 5 minutes, stirring often. Set aside to cool.
  • 3. Give the griddle a quick wipe-down, turn it down to low medium, and toss in your sliced onions along with butter. Cook for about 15 to 20 minutes, stirring often, until soft and golden.
  • 3. While onions are cooking and once mushrooms have cooled, combine mushrooms together with ground beef in a prep bowl. Stir until well-combined and form into four patties. Place on a plate, cover and put in the fridge.
  • 4. Once onions are the right texture and colour, add balsamic vinegar and cook another 2 minutes, stirring often. Remove from griddle and set aside.
  • 5. Wipe down griddle, turn it back up to medium, then add a small lug of oil and spread it around.
  • 6. Combine salt and pepper in a small prep bowl, then sprinkle roughly half of the seasoning on burgers. Place them on the griddle with the seasoned side facing down.
  • 7. After about 4 minutes, season the tops with the other half of the salt and pepper mix, then flip. Cook an additional 3 to 5 minutes until no pink remains.
  • 8. Build burgers by applying mayo to both sides of buns, then add patties and top with one to two slices of fresh mozzarella and caramelized onions.

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