Leek and Caerphilly puffs

Ingredients

• salad leaves, to serve
• 50ml/1¾fl oz white wine vinegar
• 175ml/6fl oz extra-virgin olive oil
• 1 tbsp wholegrain mustard
• 1 free-range egg, beaten
• 12 x 15cm/6in square pieces puff pastry rolled out to 2-3mm/½in thick
• salt and freshly ground black pepper
• + 6 more ingredients
• • 1 tbsp chopped fresh thyme
  • 200g/7oz mashed potato
  • 200g/7oz Caerphilly cheese, crumbled
  • 100g/3½oz butter
  • 1 garlic clove, peeled, chopped
  • 4 leeks, chopped

1. Preheat the oven to 200C/390F/Gas 6. 2. Heat the butter in a frying pan and fry the leeks and garlic for 2-3 minutes, or until softened. Stir in the Caerphilly cheese, mashed potatoes and thyme. 3. Season, to taste, with salt and freshly ground black pepper. 3. Divide the mixture between 6 o...

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