Preheat oven to 200 degrees C
Season the chicken with salt and place in an oven tray with the potatoes and onion
Mix the harissa paste with the olive oil and drizzle over the ingredients
Use your hands and give it all a gentle mix to ensure all the ingredients are coated with the harissa
Turn the chicken pieces skin side up and roast for about 30 minutes until the chicken and potatoes are cooked and the chicken skin is crisp
Transfer to a serving dish and crumble the feta on top
Squeeze the lemon over the chicken and sprinkle with fresh thyme leaves