Directions

1. Whisk the beer, wine vinegar, corn syrup, mustard, garlic, sage, salt, and black pepper together in a bowl; pour into a resealable plastic bag. Add the onion and pork chops, coat with the marinade, squeeze out excess air, and seal the bag. Marinate in the refrigerator for 12 hours.
2. Preheat an outdoor grill for medium heat, and lightly oil the grate.
3. Remove the pork chops and onions from the marinade and set aside on a platter. Drain the marinade through a fine-mesh strainer, discarding the strained liquid. Spread the garlic mixture caught in the strainer over the pork chops. Wrap the onions in aluminum foil.
4. Cook the packet of onions and the pork chops on the preheated grill until the pork is no longer pink in the center, about 7 minutes per side. An instant-read thermometer inserted into the center should read 160 degrees F (70 degrees C).