1. Prepare the base: Line a baking dish with the puff pastry, pressing it gently into the edges. 2. Make the filling: In a bowl, combine grated cheese, chopped herbs or spinach, eggs, and sour cream. Season with salt and pepper. 3. Bake the pie: Pour the filling into the pastry shell. Sprinkle with sesame seeds if desired. Bake at 180 °C (350°F) for 30−35 minutes, until golden and set. 4. Serve: Enjoy warm or chilled — perfect for any time of day!