In a mixing bowl, combine all-purpose flour, sugar, and a large egg. Mix until a dough forms, then knead it on a floured surface for about 5 minutes.

Wrap the dough in plastic wrap and let it rest for 30 minutes.

After resting, divide the dough and roll out to 1/8 inch thick. Cut out circles using a 3-inch cookie cutter.

Heat oil to 350°F and fry the dough circles for 1-2 minutes on each side until golden brown.

In a mixing bowl, combine ricotta cheese, powdered sugar, and vanilla extract. Mix until smooth and creamy.

Fill a piping bag with ricotta filling and pipe into each fried pastry shell.

Sprinkle with chocolate chips or crushed pistachios before serving.