Preheat your oven to 350°F (175°C).

In a bowl, whisk together flour, baking powder, and salt until well mixed.

In another bowl, cream the butter and sugar together until light and fluffy.

Beat in the egg and vanilla until well combined.

Gradually add the flour mixture to the wet ingredients, mixing until just combined.

Scoop tablespoon-sized amounts of dough and form them into balls.

Place the balls on a baking sheet lined with parchment paper. Create a small indentation in the center of each ball using your thumb.

Fill the indentation with a small amount of lemon curd.

Bake for 10-12 minutes, or until the edges are lightly golden.

Let cool on a wire rack before serving.