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Blue Cheese Beef Burger with Caramelised Onions & Crispy Rosemary

Caramelised onions and lettuce counterbalance the pungent flavour of tangy blue cheese, while crispy rosemary gives a great texture in contrast to the juicy burger meat.

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    Method

    • 1.In a large pan over medium heat, heat oil. Add rosemary and fry for about 1 minute, or until the leaves are crispy. Use tongs to pluck the sprigs out of the oil and place on a paper towel. When cool enough to handle, pull the leaves from the sprigs.
    • 2.Add the onions and 1/4 teaspoon of kosher salt to the pan and stir to coat. Cover and let cook, undisturbed, for 7 to 8 minutes, until they start to soften. Remove the lid and continue to cook until softened and caramelised, stirring occasionally, 7 to 8 minutes more. Remove from the heat and stir in the rosemary leaves.
    • 3.Preheat the oven (with the oven rack in the middle) to 180°. Heat a large frying pan, preferably cast-iron, over medium heat. Add the beef burgers and cook for 5 to 6 minutes, until the undersides have a nice dark brown crust. Flip the burgers and cook for 5 to 6 minutes more for medium doneness. (Be careful of the splatters!!)
    • 4.Transfer the burgers to an oven tray. Dividing evenly, crumble the blue cheese over each burger. Bake until the cheese melts, 2 to 3 minutes. Warm your buns in the oven at the same time.
    • 5.Build your burgers with the buns, patties, lettuce, caramelized onions and rosemary.

    Ingredients

    • 4 x Beef burgers
    • 3 tbsp. extra-virgin olive oil
    • 4 fresh rosemary sprigs
    • 2 medium red onions, thinly sliced into half-moons
    • 120g blue cheese, crumbled
    • 4 brioche hamburger buns
    • Lettuce leaves
    • Kosher salt

    Allergens

    • Milk (cheese)

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