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The ultimate umami burger

Ingredients for 4 portions

Per portion: 2583 kJ / 617 kcal

  • 500 g lean steak mince

  • 2 shallots finely diced

  • 3 tbsp. Kikkoman naturally brewed soy sauce
  • 
1 egg yolk
  • 
20 g parmesan cheese, grated
black pepper


  • 6 ripe plum tomatoes , halved
  • 
20 ml olive oil

  • 1 tbsp. balsamic vinegar 

  • 1 tsp. sugar 
  • 

60 g aged cheddar cheese, grated
  • 
4 burger buns, toasted 
watercress

  • 2 gherkins, sliced


Preparation

Preparation time: 1h 20 mins

Combine the mince, shallot, Kikkoman Soy Sauce, egg yolk, and parmesan cheese, in a bowl along with a twist of black pepper, divide the mixture into four patties then chill in the fridge for 30 mins.
 


Preheat the oven to 150°c fan then drizzle the tomato halves with olive oil, balsamic vinegar, Kikkoman Soy Sauce and sugar and roast for 1 hour.
 


Preheat a griddle pan, brush the burgers with a little oil then cook for around 5-6 mins per side, add grated cheddar on top of each and cook for a couple more minutes then transfer the burgers onto the toasted buns along with some watercress. Top the burgers with the slow roasted tomatoes and gherkins then finish with the top part of the bun.