450g minced beef (3-8% fat)
1 tbsp olive oil
1 egg yolk
1 tsp paprika
2 tsp tomato puree
salt and pepper
Place all the ingredients in a mixing bowl and stir to combine. Using your hands, shape into three equal-sized patties.
Preheat the grill to hot. Cook the burgers on the grill for 15 minutes, or until cooked through, turning once.
Top each burger with a slice of cheese towards the end of the cooking time.
Before serving, mix together the mayonnaise and lettuce. Cut the rolls in half and toast under the grill on both sides.
Top the bottom halves of the rolls with the lettuce and mayonnaise, followed by a slice of tomato.