Beetroot and feta tartlets - Multix

Ingredients

• 2 large beetroot
• 2 sheets puff pastry
• 1 egg yolk, lightly beaten
• 1 red onion, thinly sliced
• 1 tablespoon olive oil
• 1 teaspoon cumin powder
• 1 teaspoon coriander powder
• 1 tablespoon balsamic vinegar
• 1 teaspoon brown sugar
• sea salt and freshly ground black pepper
• 100g smooth feta
• 1 tablespoon dill, chopped