- Heat 1 tablespoon of sesame oil in a large cast iron skillet over medium-high heat for 2 minutes.
- Blot excess moisture from chuck roast, then use tongs to place chuck roast on heated skillet. Sear for 4 minutes on each side. Transfer chuck roast and drippings to crockpot.
- In a small bowl, stir together beef stock, rice vinegar, remaining sesame oil, garlic, ginger and sea salt. Pour over chuck roast. Close lid and turn to low setting. Cook 8 hours or until beef is fork tender.
- Shred beef and serve over cauliflower rice. Garnish with green onion and sesame seeds.