Marinate the chicken: In a bowl, mix harissa, olive oil, garlic, paprika, cumin, lemon juice, salt and pepper. Coat chicken evenly. Let sit 10 minutes (or overnight if possible).
Cook the chicken – Oven: Roast at 400°F for 18–22 minutes until cooked through.
Cook the chicken – Pan: Sear on medium heat for 5 minutes per side until charred and juicy.
Make cauliflower rice: Grate cauliflower or pulse in a food processor until rice-sized.
Sauté: Heat butter and oil in a skillet, add cauliflower, season with salt, pepper and garlic powder. Cook 5–7 minutes until soft but not mushy.
Assemble: Spoon cauliflower rice onto plates, top with harissa chicken.
Finish: Garnish with parsley and lemon wedges before serving.