Dried chipotle chillies have an aromatic flavour quite unlike regular dried chillies. They make a hot, subtly smoky sauce, which enhances this turkey casserole. Try serving with plain or wholemeal pasta spirals or other shapes.
Dried chipotle chillies from Mexico are available from large supermarkets and some delicatessens. If you cannot find them, you can get a similar smoky flavour by roasting a large fresh red chilli over a gas flame or in a 200°C (400°F, gas mark 6) oven until the skin is charred. Place it in a bowl and cover until cool enough to handle, then peel and deseed and proceed from Step 3.