Heat a drizzle of oil in a large pan over medium/high heat. Add riced cauliflower, salt and pepper and cook for 8-10 minutes (stir occasionally) until golden brown and tender. Remove from pan and set aside.
Increase heat to high and drizzle a generous amount of oil into pan. Add bell peppers and onion to pan, cook 6-7 minutes while stirring frequently. Once peppers and onions are tender and browned, season with salt and pepper. Remove from pan and set aside.
Reduce heat back down to medium/high. Add pork, garlic powder, cumin, red pepper flakes and a generous drizzle of oil to pan. Cook 1-2 minutes just to heat through.
Assemble fajita bowls with layers of cauli-rice, peppers & onions and shredded pork. Serve with a drizzle of Cilantro Lime Dressing, lime wedges, fresh cilantro and sliced avocado.