Polenta lasagne with mushroom ragù
By Gennaro Contaldo From Saturday Kitchen Ingredients For the mushroom ragù 3 tbsp extra virgin olive oil ½ onion, finely chopped 1 thyme sprig, leaves picked 500g/1lb 2oz chestnut mushrooms, sliced 700ml/1¼ pint passata sea salt and freshly ground black pepper For the …