01 - In a small bowl, combine kosher salt, black pepper, smoked paprika, garlic powder, onion powder, dried thyme, and cayenne pepper. Pat the brisket dry and rub the spice mixture evenly over all surfaces.
02 - Place the chopped onion and minced garlic in the bottom of the slow cooker.
03 - In a separate bowl, whisk together ketchup, apple cider vinegar, brown sugar, honey, Worcestershire sauce, Dijon mustard, soy sauce, minced garlic, chopped onion, and smoked paprika until smooth.
04 - Place the seasoned brisket on top of the onion and garlic mixture in the slow cooker. Pour the BBQ sauce over the brisket, ensuring complete coverage.
05 - Cover the slow cooker and cook on low setting for 8 hours until the brisket is fork-tender.
06 - Transfer the brisket to a cutting board and allow to rest for 10 minutes. Slice or shred the meat according to preference.
07 - Skim excess fat from the sauce in the slow cooker. Return the sliced or shredded brisket to the sauce and gently coat.
08 - Transfer to serving dish and garnish with fresh parsley. Serve hot on sandwich buns or with preferred sides.