Preheat oven to 375°F.
Preheat large, cast-iron skillet over medium-high heat.
Combine beef, salt, pepper, onion and onion juice, garlic, parsley and Worcestershire. Form 4 large, thin beef patties that are thinner at center than the edges for even cooking.
Arrange bacon on baking sheet and bake about 15 minutes until crisp.
Griddle the burgers 6-8 minutes for medium-rare to medium doneness.
Build burgers: Spread mustard on bun bottoms then pile pickles, lettuce, tomato, onions, bacon, burger patty and pub cheese. Set bun tops in place and serve.