Roast Chestnut, Mushroom and Oloroso Sherry Tart

A nigh on perfect Andalusian tart for a¬†bright autumnal Sunday lunch. All butter pastry encased around caramelised red onions, wild mushrooms, roast chestnuts, fresh lemon thyme and gently stirred with fragrant oloroso sherry and a generous knob of butter. I put some pieces of creamy citrusy Caerphilly cheese on top of this one just to…