Mix the ingredients for the patties and season with salt and pepper.
Divide the mince into 4 equal pieces and shape them into patties.
Heat a frying pan over a medium heat and fry the bacon until crisp and golden, – set it aside on a plate lined with a little kitchen paper.
In the same pan, fry the patties in the remaining bacon fat over a medium-high heat until cooked to your liking. Top each patty with a slice of cheddar.
Meanwhile, warm the burger buns in the oven.
Spread the bottom halves of the buns with a little barbecue sauce. Top with crisp salad leaves, bacon and a patty. Add slices of tomato and pickled red onions, and finish with the top half of the bun, spread with mayonnaise.