In a large skillet over medium heat, start cooking 4 slices of bacon. Grate the onion using the large holes on a box grater.
Cut the remaining 4 slices of bacon into 1-inch pieces and process in a food processor until they are almost a paste consistency (some small pieces are fine.)
In a large bowl, combine the ground beef, ground bacon, parsley, garlic an egg, grated onion, heavy cream, salt and pepper and mash everything together with your hands or a wooden spoon. Divide the mixture into four equal portions and form into patties.
Remove the bacon to a paper towel and drain off all but ¼ cup of the grease from the skillet. Reduce the heat to medium-low. Cook the patties for 4 to 5 minutes on one side.
Preheat the broiler and line a sheet pan with foil.
Meanwhile, in a small bowl, stir together the ketchup, brown swerve, mustard and hot sauce. Chop the 4 slices of cooked bacon into small pieces.
Flip the patties and cook them until they're no longer pink, another 5 to 6 minutes. Place the patties on the prepared sheet pan and spread on sauce. Broil on the lowest rack for 5 to 7 minutes to set the sauce and further roast the outside of the meatloaf patties. Top with chopped bacon and serve.
