A note from Mark
I've always been a big fan of mushrooms. When they're treated properly they bring this incredible savoury depth — almost like meat — and that's exactly what we're doing here: caramelising them hard so they do all the heavy lifting in a rich, comforting lasagne. Cook the moisture right out of the portobellos and chestnuts and they almost behave like minced meat in the ragu, with the soy and Worcestershire backing them up. This is the kind of cooking I love — comforting food built on good technique — and honestly, you really won't miss the meat.
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