Ingredients
For the burger
540g/1lb 3oz minced beef chuck steak
2 tbsp paprika
1 onion, chopped
1 tbsp Dijon mustard
1 free-range egg yolk
1 tbsp olive oil
salt and freshly ground black pepper
12 chestnut mushrooms, sliced
a good handful of grated mature cheddar
1 tbsp butter
To serve
½ iceberg lettuce, shredded
4 ciabatta rolls
1 beef tomato, sliced
Place all the burger ingredients in a mixing bowl and stir to combine. Using your hands, shape into four equal-sized patties. Leave in the fridge overnight to firm up the patties.
Preheat the grill to hot. Cook the burgers under the grill for 15 minutes, or until cooked through, turning once.
Meanwhile, sauté the mushrooms in butter till cooked. Add the grated cheese and cook till it’s melted.

Before serving, cut the ciabatta rolls in half and toast under the grill on both sides. Top the bottom halves of the ciabatta rolls with the lettuce, followed by a slice of tomato. Arrange the burger on the tomato. Add the cheese mushroom mixture on top of the burger. Top each burger with the other halves of the ciabatta rolls and serve.














