BBC Food - Recipes - Sun-dried tomato, emmental cheese and pesto puff pastry tarts

Ingredients

• 250g/9oz plain flour , plus extra for dusting
• 250g/9oz very cold butter , cut into small cubes
• ½ tsp salt
• 125ml/4fl oz ice cold water
• 60g/2¼oz fresh basil leaves
• 50g/2oz pine nuts , toasted
• 50g/2oz Parmesan , grated
• 2 cloves garlic, peeled
• 125-175ml/4-6fl oz extra virgin olive oil
• 275g/10oz puff pastry (from above)
• 2 tbsp wholegrain mustard
• 200g/7oz emmental cheese, grated
• 100g/4oz fresh tomatoes , sliced
• 75g/2¾oz sun-dried tomatoes , diced
• 2 tbsp olive oil
• 1 egg yolk , beaten
• handful rocket leaves, to serve