Heat the olive oil in a large pot over medium heat and brown the sliced andouille sausage until crisp.
Remove the sausage with a slotted spoon and set aside, leaving the rendered fat and oil in the pot.
Whisk the cassava flour into the pot, stirring constantly for 5-7 minutes until the roux reaches a deep golden brown color.
Add the diced onion, bell pepper, and celery to the roux, sautéing until the vegetables are tender and translucent.
Stir in the minced garlic, okra, creole seasoning, thyme, sea salt, and black pepper for one minute until fragrant.
Slowly pour in the chicken bone broth while whisking to ensure no lumps remain in the roux.
Add the bay leaf and the browned sausage back into the pot, bring to a gentle boil, then reduce heat and simmer for 15 minutes.
Gently stir in the shrimp and cook for 3-4 minutes until they are pink, curled, and just opaque.
While the gumbo finishes, steam the cauliflower rice until tender.
Discard the bay leaf and serve the hot gumbo over the cauliflower rice, garnished with fresh chopped parsley.