Preheat oven to 375F and spray a large baking sheet with nonstick cooking spray. Set aside.
Chop the bacon into small pieces before adding to a pan over medium-high heat. Dice the onion while the bacon cooks.
Transfer the cooked bacon to a paper towel to drain and immediately add the onion and ground beef. Cook until no pink remains.
Add the BBQ sauce and relish, stir, reduce the heat to low, and simmer for a few minutes before removing from the heat. (Your cheeseburger filling should be thick so there's no runoff during baking. If it's too runny, continue to simmer to thicken the mixture.)
Roll out the dough and press one half together with your fingers. Make sure there are no gaps in the dough. (*Braid instructions in the notes below.*)
Fill the pressed side with the cheeseburger mixture and top with cheese before folding the other half over the top. Press the edges together to seal. You can use a fork to crimp the edges, though I didn’t find it necessary.
Bake for 12-15 minutes or until golden brown on the top and cooked on the bottom. Be sure to check the bottom. If the top browns before the bottom cooks, cover the foil to finish cooking.