Darina Allen: Three great cookbooks to buy and a recipe for Mary Berry’s humble pie

Mary Berry's humble pie is hearty, warming and a real treat!
Want a little advice on how to use your book tokens after the festive season? Before Christmas, I got lots and lots of newly published cookbooks through the post, but I was so crazily busy that I just about managed to flick through them but didn’t manage to test anything from them until now.