Fry the bacon over a medium heat with the dripping or butter until the bacon fat starts to turn golden, turning the bacon once. Remove and keep warm.
Take the two slices of bread and liberally pepper one side. Place the pepper sides down into the fat in the bacon pan and cook until bread is golden.
If required, butter the uncooked side of the bread.
Place the bacon onto the uncooked side. Top with the ketchup or brown sauce of your choice, then finish by placing the other slice of bread on top, uncooked side down.