Place a frying pan over high heat and add 1 tablespoon of the sesame oil, and the chicken thighs. Saute for 7-10 minutes until cooked through. Set aside.
Place a saucepan over high heat and add the rest of the sesame oil, garlic, ginger, and salt. Saute for 5 minutes.
Add the cauliflower rice and sprinkle over the xanthan gum. Mix well.
Add the chicken stock and bring to a simmer. Reduce to medium heat and simmer for 15-20 minutes until the cauliflower is soft.
While the cauliflower is simmer, shred the chicken.
Stir through the shredded chicken, rice wine vinegar, and pepper.
Serve topped with the scallions. Drizzle over tamari sauce and sesame oil to taste.