1. Add pulled pork, broth, and dry rub to a large skillet over medium heat. Stir gently to combine and simmer over medium low heat until heated through and ready to serve.
2. Arrange pretzel buns opened with the inner side facing up on a baking sheet. Slather generously with butter and broil in the oven until just golden and toasted. Remove and set aside.
3. Add a pat of butter to a small, nonstick skillet. When the butter starts to foam, crack in an egg. Season with salt and pepper to taste. Cover and cook for 2-3 mins over medium heat. If the yolk starts to turn white and opaque, remove from the pan immediately. Transfer the egg to a plate and place in a warm, off oven to keep warm while you repeat with the remaining eggs. Alternatively, you can cook multiple eggs at the same time, remove to a plate, and cut apart.

To Build the Sandwich

Add the bottom bun to a plate and top with the following layers: cheddar cheese, pulled pork, fried egg, salsa, and top bun .