Mini Puff Pastry Kourniki

Finely dice the chicken fillet, onion, potatoes, mushrooms, and herbs. Add salt, black pepper, and vegetable oil, then mix the filling thoroughly.

Lightly roll out the puff pastry on a floured surface and cut each sheet into 9 equal squares.

Place a portion of the filling in the center of each square and tightly pinch the edges to form mini kourniki.

Transfer the pastries to a baking sheet lined with parchment paper. Brush with beaten egg and sprinkle with sesame seeds if desired.

Bake in an oven preheated to 180°C (350°F) for 20–25 minutes until golden brown.