Arrange the potato chunks and limes in a casserole dish or roasting pan.
Sprinkle half the sachet contents over them.
Drizzle with half the oil.
Combine remaining sachet contents with the remaining oil.
Rub over the chicken portions.
Arrange the chicken on top of the potatoes and limes.
Roast for 45 min to 1 hour at 190°C or until chicken is cooked.