In a heavy-bottomed pot or Dutch oven, heat the avocado oil over medium heat and whisk in the cassava flour to create a clean-eating roux.
Continue whisking the roux for 5-7 minutes until it reaches a deep golden brown color, being careful not to let it burn.
Stir in the diced onion, green bell pepper, and celery, sautéing until the vegetables are softened and fragrant.
Add the diced chicken breast and sliced andouille sausage to the pot, cooking for 3-4 minutes until the meat is lightly browned.
Pour in the chicken bone broth and add the sliced okra, creole seasoning, sea salt, and black pepper.
Bring the mixture to a gentle boil, then reduce the heat to low and simmer for 20 minutes to allow the flavors to meld and the sauce to thicken.
While the gumbo simmers, steam the cauliflower rice in a separate pan until tender.
Ladle the hot gumbo over the cauliflower rice and garnish with fresh chopped parsley before serving.