Caramelised Fennel Tart - AZALEA

Ingredients

• 3 tbsp Azalea Grapeseed Oil
• 1 large bulb fennel, very thinly sliced (fronds reserved to garnish)
• 1 large brown onion, very thinly sliced
• 1 tbsp brown sugar
• 3 tbsp vincotto or aged balsamic vinegar
• 2 sheets store-bought puff pastry
• 1 egg, whisked with a splash of water
• 2 tbsp Dijon mustard
• 3 sprigs thyme, leaves picked
• 3 tbsp finely grated parmesan
• Sea salt and freshly cracked black pepper