Prepare the Patties: Divide the minced chuck steak into 4 equal portions. With wet hands, shape each portion into a ball, then flatten into patties about 12cm wide and slightly larger than your buns. Place the patties on an oiled plate and refrigerate while preparing the toppings.
Prepare the Toppings: In a small bowl, toss the red onion slices with a pinch of salt. Set aside to marinate. Mix the chopped lettuce with mayonnaise, ketchup, mustard, and Worcestershire sauce to make the burger sauce. Adjust seasoning to taste.
Cook the Burgers and Beef: Heat two pans: one large non-stick pan on high heat for the burgers and another pan on medium heat for the beef. Brush each patty lightly with oil and season generously with salt and pepper. Place two patties in the hot pan and press down with a spatula. Cook for 1 minute. Flip the patties, brushing the cooked side with ½ teaspoon mustard and a dash of Tabasco. Cook for 1 more minute, flip again, and repeat the brushing on the other side. After another minute, top each burger with a slice of crispy ground beef and a slice of cheese. Add a splash of water to the pan and cover with a heatproof bowl to melt the cheese (about 30 seconds).
Toast the Buns: While the burgers cook, toast the bun halves in the ground beef fat in the other pan until lightly golden.
Assemble the Burgers: Spread a quarter of the burger sauce onto each bottom bun. Top with the cheesy ground beef burger, marinated onions, and gherkin slices. Rub 1 teaspoon of ketchup on the top bun, then place it on the burger. Gently press down to allow the juices to soak into the bun.
Optional Sloppy Style: For a messier experience, wrap the assembled burgers in greaseproof paper and let them rest for a minute before serving.
Enjoy these juicy, flavorful Spicy homemade hamburger straight from the pan or with your favorite sides like fries or a fresh salad!