Preheat oven to 350°F.

Sift flour with baking powder, then combine them in a bowl with the salt.

In another bowl, combine butter with sugar and mix well.  Add eggs, vanilla and lemon zest; mix to combine.

Pour mixture into center of dry ingredients. Stir until a soft dough is formed.

Knead a few times on a lightly floured work surface. Roll or pat to 1/4-inch thick.

Cut into 3-inch circles and fill with between a half teaspoon and a teaspoon of your desired filling. Pinch corners into a triangle.

Bake on a silicone sheet or parchment for 20 to 25 min or until slightly golden. They should not turn brown.