Grease a bundt tin, roll your dough into a sausage and lay it in, pinching at the seams to join. Cover and leave to proof for 30 minutes or so. Bake for 40 minutes at 160°C, then transfer to a wire rack and leave to cool.
In a small bowl, combine mayo, ketchup, mustard, onion and garlic powder, vinegar. Set aside.
Add 1 tsp salt and black pepper to the mince and mix well with your hands. Transfer to a lined sheet pan and shape into a ring slightly larger than your bread. Grill under a hot grill until browned and cooked through.
Lay the cheese on top of the burger ring. Grill until melted.
Cut your bread ring in half and spoon on a bunch of burger sauce. Top with shredded lettuce and your burger patty. Top with more sauce and some crispy bacon, then the top half of the bread.