Book excerpt: Mary Berry, queen of cooking on the range, has written the first cookbook to bring Aga cookery up to date. Aga cuisine need no longer be confined to stews and casseroles. Mary Berry shows how to cook contemporary and delicious food such as grilled vegetables, baked Thai curry, and filo parcels with ricotta and spinach. The recipes are complemented with detailed introductory material that shows you how to get the very best from your Aga - whether a new convert or an established devotee - and with this book it can become the warming heart of your family kitchen.