BBC Food - Recipes - Chestnut, leek and mushroom tartlets

Ingredients

• 225g/8oz ready-made puff pastry (thawed if frozen)
• 55g/2oz wild rice
• 2 tbsp olive oil
• 15g/½oz vegan margarine
• 370g/13oz leeks , finely chopped
• 110g/4oz oyster mushrooms , sliced
• 200g/7oz packed cooked and peeled chestnuts , chopped
• 2 sprigs fresh rosemary , leaves only, chopped
• 1 tbsp fresh sage , finely chopped
• salt and freshly ground black pepper
• 1-2 tbsp soy sauce