Ultimate burger in a brioche bun

James Martin once worked in one of the oldest diners in America, so he’s well-placed to judge what makes the ultimate burger recipe.

Ingredients

  • 800g/1lb 12oz best-quality beef steak, minced
  • 3 egg yolks
  • 1 tbsp Dijon mustard
  • 300ml/10½fl oz rapeseed oil
  • 25g/1oz beer mustard or wholegrain mustard
  • ½ lemon, juice only
  • 2 tbsp vegetable oil
  • 4 brioche rolls, cut in half
  • 4 tbsp ready-made mild chilli relish
  • ½ round lettuce, leaves separated
  • tomatoes, sliced
  • 200g/7oz cheese, preferably Monterey Jack, sliced
  • 8 gherkins, drained, sliced
  • 1 red onion, peeled, sliced
  • salt and freshly ground black pepper