Melt in the Middle Caramelised Onion Beef Burger

Meanwhile, cut the Cheddar in half widthways. Keep one chunk of cheese per person aside, then grate the rest.
In a large bowl, add the beef mince, season with the salt for the burger (see ingredients for amount) and pepper, then mix together with your hands.
Roll the mince into even-sized balls. Shape into 2cm thick burgers around a chunk of cheese, ensuring they’re well sealed (1 per person). IMPORTANT: Wash your hands and equipment after handling raw mince.

After the chips have cooked for 10 mins, pop the burgers onto a lightly oiled baking tray and bake on the middle shelf of your oven until cooked through, 12-15 mins. IMPORTANT: The mince is cooked when no longer pink in the middle.

Meanwhile, heat a drizzle of oil in a large frying pan on medium-high heat.
Once hot, add the bacon lardons and stir-fry until golden, 4-5 mins. While the bacon fries, halve, peel and thinly slice the onion.
Transfer the lardons to a bowl but keep the bacon fat in the pan. IMPORTANT: Wash your hands and equipment after handling raw meat. Cook lardons thoroughly.

Pop the pan with the bacon fat back on medium heat with a drizzle of oil if it's a little dry.
When hot, add the onion and sugar (see ingredients for amount). Season with salt and pepper, then fry until soft and sweet, 8-10 mins. Remove from the heat.
Meanwhile, halve the baby gem lengthways through the root, then cut each half lengthways into 3 wedges.
Mix together the soured cream, water for the dressing and cider vinegar (see ingredients for both amounts) in a small bowl. Season with salt and pepper, then set the dressing aside.