In a large bowl, gently break apart the ground beef, mixing in Worcestershire sauce, black pepper, and salt. Let rest for about 10 minutes.

Divide the seasoned beef into four equal portions and shape each into thick patties about 1 inch thick.

Preheat your grill or skillet over medium-high heat until hot.

Carefully place the patties on the grill and cook them for 4-5 minutes without pressing down.

Flip each patty and continue grilling for another 3-4 minutes, adding shredded Irish cheddar to melt.

In a separate skillet, heat a drizzle of oil and add sliced onions. Cook for about 10-15 minutes until caramelized.

Assemble your burgers starting with the bottom half of a toasted bun, then add the patty, bacon, and caramelized onions.

Serve immediately with crispy fries or salad.