Preheat your oven to 200C/390F.Place the chicken thighs into a roasting tray and sprinkle over the oil, zest from the lemon and salt.Roast for 15-20 minutes until browned and cooked through.Dice or shred into small pieces and set aside.Place a large saucepan over high heat.Add the butter, oregano, onion and garlic and saute until the onion is translucent.Add the cauliflower and stir well.