Caramelise the Onions: Heat the olive oil and butter in a large frying pan over a low-medium heat. Add the sliced onions and a pinch of salt. Cook slowly for 15-20 minutes, stirring occasionally, until the onions are soft, golden, and sweet. Add the brown sugar for the last 5 minutes of cooking to help them caramelise beautifully. Once done, remove from the pan and set aside.

Mix the Burger Sauce: While the onions are cooking, prepare the sauce. In a small bowl, combine the mayonnaise, ketchup, American mustard, chopped pickles, vinegar, and paprika. Stir well until everything is evenly mixed. Cover and pop it in the fridge until you're ready to assemble.

Form the Patties: Place the Halal beef mince in a large bowl. Season with the salt and black pepper. Gently mix the seasoning through the meat with your hands, but be careful not to overwork it, as this can make the burgers tough. Divide the mixture into four equal portions and shape them into patties slightly wider than your burger buns (they will shrink as they cook).

Cook the Burgers: Wipe out the frying pan you used for the onions and place it over a medium-high heat. Add the vegetable oil. Carefully place the patties in the hot pan, ensuring you don't overcrowd it (cook in batches if necessary). Cook for 3-4 minutes on the first side without moving them. What works best for me is giving them just one firm press with a spatula after about a minute to ensure a great crust, a technique popularised in smash burger recipes.

Flip and Add Cheese: Flip the burgers and cook for another 3-4 minutes for a medium cook. During the last minute of cooking, place a slice of cheddar cheese on top of each patty and cover the pan with a lid (or a metal bowl) to help the cheese get gloriously melty.

Toast the Buns: While the cheese is melting, split your brioche buns. Once the burgers are cooked, remove them from the pan to a plate to rest for a minute. Place the buns cut-side down in the hot pan and toast for 30-60 seconds in the beef juices until lightly golden and warmed through. This step adds so much flavour!

Assemble Your Masterpiece: Now for the fun part! Spread a generous amount of burger sauce on the top and bottom of each toasted bun. Place a cooked patty on the bottom bun, top with a spoonful of the sweet caramelised onions, and finish with a few slices of crunchy dill pickle. Place the top bun on and serve immediately.