01 -
In a large bowl or directly in the slow cooker insert, whisk together soy sauce, brown sugar, honey, sesame oil, rice vinegar, grated ginger, minced garlic, red pepper flakes, and black pepper. Add the thinly sliced onion to the mixture and stir to combine.
02 -
Place the trimmed chuck roast on top of the onion and sauce, ensuring it is mostly submerged. Cover and cook on low for 8-10 hours or on high for 4-5 hours until the beef is tender and easily shredded with a fork.
03 -
Once cooked, remove the beef from the slow cooker and shred into bite-sized pieces using two forks.
04 -
To thicken the sauce, mix cornstarch with cold water to create a slurry. Stir the slurry into the sauce in the slow cooker and cook on high for 15-20 minutes, stirring occasionally until thickened. Alternatively, reduce the sauce on the stovetop over medium heat until desired consistency is reached.
05 -
Return the shredded beef to the thickened sauce and stir to coat evenly. Let simmer for an additional 10-15 minutes to meld flavors.
06 -
Serve the beef over cooked rice, garnished with sliced green onions and sesame seeds. Optionally, accompany with kimchi or use in lettuce wraps, tacos, or sliders.