Marinate pork chops in beer (minus 1/4 c.) for 1 hour.
Heat oil in skillet over medium heat. Fry bacon - cook about 2-3 minutes less than you normally would. Remove bacon. Leave fat in skillet.
Reduce heat to medium low. Add onion to pan. Cook 12-15 minutes. Stir occasionally to prevent from burning.
Increase heat to medium. Add garlic and cook for 1 minute. Add apple cider vinegar, brown sugar, and mustard powder. Cook 3-4 minutes.
Add in 1/4 c. beer, bacon, and pork chops. Cook pork 3 minutes on each side.
Top with relish.