Cook bacon over medium heat in a nonstick skillet until crisp, about 5 minutes. Drain bacon on a paper towel-lined plate; set aside. Do not wipe out the pan.

Add onions and pinch of salt to the pan with the bacon grease, and turn heat to medium-high. Sauté until onions soften up and start to take on golden-brown color, 3 to 4 minutes. Add beef; cook, breaking up the meat with a spatula into small crumbles, until browned, 5 to 7 minutes.

Stir salt, freshly ground black pepper, cayenne, and Worcestershire sauce into the beef; continue to cook until beef is browned and any liquid in the pan has evaporated.

Turn off the heat. Stir in reserved bacon, 2 tablespoons ketchup, 1 tablespoon mustard, and 1/2 the shredded Cheddar cheese. Let mixture cool to room temperature before using, about 15 minutes.

Preheat the oven to 375 degrees F (190 degrees C). Line a baking sheet with parchment paper.

Using only as much flour as needed, press, roll and stretch pizza dough out into a 10x15-inch rectangle.

Transfer meat mixture onto dough, leaving edges uncovered. Scatter dill pickle and green onions over beef, and then top evenly with remaining cheese. Brush a little water along the edges to seal.

Fold the dough from each side over the filling, and roll tightly. Place the roll seam-side down on the sheet pan. Brush with melted butter or beaten egg and sprinkle with sesame seeds.

Bake in the preheated oven until well browned, about 35 minutes.

Meanwhile, whisk together all the 'Secret Sauce' ingredients in a small bowl.