1. Preheat oven to 400.
2. Line baking sheets with parchment paper, set aside.
3. In mixing bowl, combine butter, sugar, lemon zest and juice, beat at medium speed until creamy.
4. Add flour and salt, beat until combined.
5. Using a 1 inch teaspoon or scoop scoop dough into balls.
6. Place on baking sheets and flatten slightly with fingers or back of measuring cup.
7. Bake for 8 minutes until firm.
8. Let cookies cool before filling with cooled filled.
9. Spread half of cookies with filling.
10. Top with remaining cookie half.
11. Sprinkle with confectioners sugar to serve.

Can be frozen without the filling.  Fill cookies before serving for best results.

Filling:  Purchased Lemon Curd