For the best burger, go to your butcher and ask them to grind 1 3/4 lbs of chuck steak for you. This cut has a really good balance of fat and flavorsome meat. Divide it into 4 and, with wet hands, roll each piece into a ball, then press into flat patties roughly 5 inches wide and about 3/4 inch wider than your buns. Place on an oiled plate and chill in the fridge. Next, finely slice the red onion , then dress in a bowl with the vinegar and a pinch of sea salt. Slice the gherkins and halve the buns. Finely chop the lettuce and mix with the rest of the burger sauce ingredients in a bowl, then season to taste.

I like to cook only 2 burgers at a time to achieve perfection, so get two pans on the go—a large non-stick frying pan on a high heat for your burgers and another on a medium heat for the bacon. Pat your burgers with oil and season them with salt and pepper. Put 2 burgers into the first pan, pressing down on them with a slotted spatula, then put half the bacon into the other pan. After 1 minute, flip the burgers and brush each cooked side with a 1/2 teaspoon of mustard and a dash of Tabasco. After another minute, flip onto the mustard side and brush again with another 1/2 teaspoon of mustard and a second dash of Tabasco on the other side. Cook for 1 more minute, by which point you can place some crispy bacon on top of each burger with a slice of cheese. Add a tiny splash of water to the pan and place a heatproof bowl over the burgers to melt the cheese—30 seconds should do it. At the same time, toast 2 split in the fat in the other pan until lightly golden. Repeat with the remaining 2 burgers.