Mix deep-frozen blueberries with jam sugar and star anise in a pot. Quarter the pears, peel, remove seeds, cut into small cubes and add to the blueberries in the pot. Cook a jam according to the instructions on the packet and pour into glasses.
Mix flour with sugar, dry yeast and baking powder in a bowl. Add milk, oil, yoghurt and egg. Mix everything with the dough hooks of the hand mixer to a smooth dough. Cover and leave to rise in a warm place for 45-60 minutes.
Preheat the oven at 225°C (gas: level 4-5, convection oven: 20°C). Line a baking tray with baking paper. Let it get hot in the oven.
Knead the dough, divide into apricot-sized portions, form into balls and press into a flat cake. Place the flat cake on the baking tray. Brush with water and sprinkle with sesame seeds. Bake for about 8-10 minutes.
Rinse and clean the celery and dice very finely. Put a blob of yoghurt and jam on each naan and sprinkle with celery.