If using the cauliflower base mix together the steamed cauliflower rice with the salt and garlic. Spread in the bottom of a 9 x 13 baking dish.
Combine the first 7 ingredients and mix well. Fold in ½ cup of the feta cheese, the chicken, spinach, tomato, and green onion. Spread on top of the prepared cauliflower rice or in the bottom of a 9 x 13 baking dish.
Sprinkle the remaining ½ cup feta cheese on top. Bake for 30-35 minutes until hot.