Unfortunately, you can’t substitute cauliflower rice for white rice. The liquid in this recipe is absorbed by the rice, so substituting cauliflower rice would result in a very soupy texture. BUT the good news is that we’ve already got a Paleo cheesy broccoli casserole. If you want to make it a full meal, we recommend adding about 4 cups shredded chicken to the broccoli and cauliflower mixture before baking. We haven’t tested substituting brown rice for white rice in this recipe yet. Typically, brown rice requires more liquid to cook than white rice, so we’d recommend adding an extra cup of broth to the recipe.