Preheat the oven to 200°c / gas 6. Place the chicken breasts on a baking tray, season with black pepper and sprinkle over the lime juice and 1 tbsp water. Cover with foil and roast for 20mins until the chicken is cooked through.
Meanwhile, cut the ciabatta in down the middle. Brush with the oil and warm under the grill.
Top with sweet chilli sauce, mayonnaise, lettuce leaves. Slice the chicken and arrange on top
Serve immediately with some fries or wedges, salad and coleslaw.