Slice the chicken breast and andouille sausage into bite-sized pieces.
Heat avocado oil in a large pot over medium heat and brown the chicken and sausage until golden, then remove and set aside.
In the same pot, whisk the cassava flour into the remaining oil and juices to create a dark, nutty roux.
Add the diced onion, green bell pepper, and celery to the roux, sautéing until the vegetables are softened.
Stir in the minced garlic, cajun seasoning, sea salt, black pepper, thyme, and oregano for one minute until fragrant.
Pour in the chicken bone broth and add the sliced okra and browned meats back into the pot.
Bring to a boil, then reduce heat and simmer for 20 minutes to allow the flavors to meld and the gumbo to thicken.
While the gumbo simmers, steam the cauliflower rice until tender.
Ladle the spicy gumbo over the cauliflower rice and serve hot.