1. Preheat the oven to 375°F (190°C).
2. In a bowl, mix flour and salt. Cut in butter until mixture resembles coarse crumbs.
3. Stir in ice water, a tablespoon at a time, until mixture forms a ball.
4. Wrap in plastic and refrigerate for 30 minutes.
5. Roll out dough on a floured surface to a 12-inch circle.
6. Transfer to a baking sheet lined with parchment paper.
7. Spread lemon curd in the center, leaving a 2-inch border.
8. Fold the edges of the dough over the lemon curd.
9. Brush the dough with beaten egg.
10. Bake for 25-30 minutes or until golden brown.
11. Let cool, then dust with powdered sugar before serving.

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