Nibblous | chestnut, onion and apple pie

Ingredients

• shortcrust pastry ... enough for lining and top for 9½ inch loose-bottomed flan tin
• 12 oz tinned or vacuum-packed chestnuts
• 12 oz onion, chopped
• 1lb good crisp eating apples, peeled, cored and chopped into small pieces (don't use food processor as the texture isn't chunky enough)
• sage ½tsp dried or 1 tsp fresh
• thyme ½ dried or 1 tsp fresh
• 3 eggs