Using a large stock pot or Dutch oven, heat the avocado oil over medium heat. Add the pork tenderloin, seasoning with salt and pepper. Saute for about 3 min on each side or until cooked through.Set aside.
Adding more fat to the pan if needed, cook the garlic and ginger for 2-3 minutes or until fragrant. Add the mushrooms and bamboo shoots and saute for 4-5 minutes or until tender. Add the shredded cabbage and cook until mostly wilted for about 2 minutes.
Pour in the chicken broth (reserving 1/4 cup and setting aside), coconut aminos, lime, chili sauce if using and more salt and pepper to taste. Add the pork back and simmer for about 10 minutes to combine the flavors.
While the soup is simmering, combine the 1/4 cup of broth with the arrowroot starch. Whisk together to thicken and add to the soup and stir. Simmer for another few minutes to allow the soup to thicken.
Finish with green onion and further to taste.
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Notes
All nutritional information are estimations and will vary. Nutrition facts do not include optional bamboo shoots.