Lay strips of uncooked bacon over a sheet pan fitted with a rack. This will allow the bacon fat to drip off onto the sheet pan and cause the bacon to crisp when baked.
Lightly sprinkle some fresh ground black pepper and brown sugar over the uncooked bacon. Add some kosher salt depending on how salty you like your bacon.
Place the bacon in a cold oven and then set the oven temp to 400 degrees and bake for about 10 to 15 minutes depending on how crispy you like it and thickness of the bacon. (I start checking on it around the 7 minute mark)
Move the cooked bacon to a plate covered in paper towels to drain.
Brush on the melted butter on one side of the bread and grill buttered side till golden brown.
Add bacon, tomatoes, lettuce and mayo to grilled bread slices, pop open a beer and enjoy!