Belly button pastry (belly button cake)

Instructions

1. Mix the flour, baking powder, sugar and a pinch of salt in a bowl.
2. Rub in the cold butter cut into cubes with your fingertips until you get a sandy texture.
3. Add the egg and milk, then knead just enough to form a smooth dough. Rest for 20 minutes in the fridge.
4. Divide the dough into 6 balls and flatten each into a 10 cm disc.
5. Place a spoonful of filling in the centre of each disc, then bring the dough up and pinch it in the middle to form a little belly button.
6. Place the pastries on a tray lined with baking paper, brush with the egg yolk mixed with milk and sprinkle with sesame if you like.
7. Bake at 180 °C for 18 to 20 minutes, until nicely golden. Let them cool slightly before serving.