Creating the Irish Pub Burger can be effortless if you follow these nifty steps:

1. Prepare the Beef: In a large bowl, combine ground beef, salt, pepper, Worcestershire sauce, and Dijon mustard. Mix gently until ingredients are just combined.
2. Form Patties: Divide the mixture into four equal portions. Shape each portion into a patty, making a slight indentation in the center to prevent puffing while cooking.
3. Preheat Grill or Skillet: Heat your grill or a skillet over medium-high heat. If using a skillet, you may add a drizzle of oil to ensure the patties do not stick.
4. Cook the Patties: Once hot, add the patties to the grill or skillet. Cook for about 4-5 minutes on one side, then flip.
5. Add Cheese: Once flipped, place a slice of cheddar cheese on each patty. Cook for an additional 4-5 minutes or until the cheese is melted and the preferred doneness is achieved.
6. Prepare Buns: While the patties are cooking, you may toast the hamburger buns on the grill or in a toaster for extra crunch.
7. Assemble the Burger: Start with the bottom bun, place the patty with melted cheese on top, and layer the sautéed onions, tomato slices, coleslaw, and mixed greens.
8. Top It Off: Add any extra toppings you desire, such as spicy mustard, pickles, or hot sauce.
9. Close and Serve: Place the top bun on the assembled burger and serve immediately with fries or your favorite side dishes.

By following these straightforward steps, you will enjoy a burger bursting with flavor that embodies the spirit of an authentic Irish pub experience.