
In a food processor add the sugar, salt, oil, egg and yolk, pulse just to combine, add the flour, zest and baking powder pulse to combine, add 2-3 tablespoons of water 1 tablespoon at a time until the dough starts to come together.
Move the dough to a lightly floured flat surface and gently knead to form a smooth compact dough that doesn't stick to your hands. Wrap in plastic wrap and refrigerate one hour before using.