Mushroom, Lentil and Ale Pie

This pie came about because, firstly, I adore pie. It was my pregnancy craving – steak pie followed by cherry or apple pie. I would buy packets of Mr Kipling and polish them off by the half dozen. Something about the crumbling, yielding collapse of the pastry, the hot-or-cold, sweet-or-savoury, the lingering lubrication, satiation, of a layer of fat and gravy disappearing down my greedy gullet. I make a pie most weeks, more so since cooking vegan food than ever before. This