Preheat the oven to 400ºF. Line two baking sheets with parchment paper, or grease them lightly with your choice of cooking fat.
On one baking sheet, prepare your fajitas by laying out the sliced veggies and chicken. Season with spices then drizzle with avocado oil. Toss to coat evenly.
On another baking sheet, toss the cauliflower rice with avocado oil and salt & pepper. Lay out in a flat layer.
Place both baking sheets in the oven (I put the cauliflower rice on the lower rack) and bake for 20 to 25 minutes. Toss the chicken and vegetables once halfway through for even cooking.
Serve in bowls with cauliflower rice on bottom, and the chicken fajitas on top.
Layer with your favorite garnish- avocado, chopped cilantro or red onion, salsa, or fresh lime. Enjoy!