Goat Cheese Tart with Caramelized Onions and Wild Blueberries

Ingredients

• 14 oz plain flour
• 1 tbsp sesame seeds
• 1 tbsp black onion seeds
• 1 tbsp freeze dried parsley
• 7 oz cool unsalted butter or margarine (cut into pieces)
• 1/2 tsp salt
• 6 oz cold water
• 1 small red onion (finely chopped)
• 2 tbsp virgin olive oil
• 2 tbsp caster sugar
• 1 tbsp balsamic vinegar
• 3 1/2 oz frozen wild blueberries
• 7 oz firm goats cheese (cut into cubes)
• 1 free range egg
• 3 free range egg yolks
• salt and freshly ground pepper
• 10 fl oz whole milk
• 3 oz frozen wild blueberries
• generous sprig fresh tarragon or parsley (chopped)