Wagyu Burger With Duck Egg and Pickled Mushroom Ketchup

You've seen a burger topped with a fried egg before, but you've never seen one with a pickled duck egg cooked sous vide!


For the patty

  • 1 lb Wagyu beef top sirloin, ground
  • 1 lb Wagyu dry-aged strip steak, ground
  • 2 tsp salt
  • 2 tsp coriander seed, toasted and ground
  • 1 1/2 tsp ground black pepper
  • 1/4 tsp ground cloves
  • 1/4 tsp onion powder
  • 1/4 tsp garlic powder

For the duck egg

  • 1 duck egg
  • 3 1/3 cups beet juice
  • 12 ounces port wine
  • 1 Tbsp flaky sea salt

For pickled mushroom ketchup

  • 300ml red wine vinegar
  • 1/2 cup caster sugar
  • 4 cups button mushrooms
  • 2 1/2 tbsp salt
  • 120ml red wine
  • 1 shallot, chopped
  • 1/4 tsp ground mace
  • 2 cloves
  • Corn flour

For the duck chips

  • 1 potato
  • 2 cups duck fat


  • 1/2 ounce Point Reyes blue cheese, in chunks
  • 1 ounce gruyere, grated
  • 1/4 cup baby arugula
  • Brioche baguette, halved and toasted


To make the Duck Egg

  1. Cook duck egg in boiling water for 4 minutes. Transfer to ice water bath for 20 minutes.

  2. Cook in sous vide water bath at 143 C for 30 minutes.

  3. Cool again in water ice bath for 10 minutes.

  4. Using back of spoon, gently crack egg all over (do not take shell off). Reserve.

  5. Combine beet juice and red port wine and reduce to 3 cups.

  6. Immerse egg in reduction and soak in fridge for 12 hours.

  7. Drain and gently peel off egg shell.

  8. Reheat egg in 143C water bath for 25 minutes prior to service. Season with pinch of flaky sea salt.

To make Pickled Mushroom Ketchup

  1. Bring red wine vinegar and sugar to a boil. Pour over mushrooms. Leave in fridge overnight. Reserve.

  2. To make mushroom juice, rough chop 3 cups of button mushrooms, add 2 1/2 Tbsp salt.

  3. Hang up to dry in a cheese cloth overnight, allowing the juices to fall out into a container to capture mushroom
    liquid. Reserve.

  4. Boil red wine and red wine vinegar, add in reserve mushroom liquid.

  5. Reduce by 2/3rds, thicken with corn flour.

  6. Add pickled mushrooms from overnight mixture, stir to combine.

To make duck chips

  1. Slice potatoes paper thin using a mandoline.

  2. Soak in cold water, pat dry. Deep fry, drain on paper towels.

To make the burger

  1. Grill patty 4 minutes, flip, cook another 2 minutes. Top with cheeses and remove from grill.

  2. Grill baguette on each side to toast.

  3. Top patty with pickled mushroom ketchup, arugula, duck chips, and "preserved" duck egg. Serve.

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Wagyu Burger With Duck Egg and Pickled Mushroom Ketchup