Prep the cauliflower rice: If using a whole cauliflower, cut into florets and pulse in a food processor until it looks like rice. Don’t over-process. Set aside.
Make the seasoning: In a small bowl, combine chili powder, cumin, smoked paprika, garlic powder, onion powder, oregano, salt, pepper, and cayenne if using.
Season the chicken: Pat the sliced chicken dry.
Toss with half the seasoning and 1 tbsp olive oil. Let it sit while you slice the peppers and onion.
Cook the chicken: Heat a large skillet over medium-high heat. Add the chicken in a single layer.
Sear 3–4 minutes per side until cooked through and lightly charred at the edges. Remove to a plate.
Sauté the veggies: In the same skillet, add 1 tbsp olive oil. Add peppers and onion, plus the remaining seasoning.
Cook 4–6 minutes, stirring occasionally, until tender-crisp and slightly charred.
Finish with lime and cilantro: Return the chicken to the skillet with the veggies. Add lime zest and juice, and sprinkle with chopped cilantro. Toss to coat and adjust salt if needed.
Cook the cauliflower rice: In a separate pan, heat 1 tbsp olive oil or butter over medium heat.
Add garlic (if using), then the riced cauliflower, salt, and pepper. Cook 4–6 minutes, stirring, until tender but not mushy.
Assemble the bowls: Add a bed of cauliflower rice to each bowl. Top with chicken and fajita veggies.
Finish with your favorite toppings like avocado, salsa, or a dollop of Greek yogurt.