Preheat oven to 400F. Line cookie sheets with silpats or parchment paper.
In a small mixing bowl, whisk flour, baking powder, and salt. Set aside.
In a large mixing bowl, whisk together the eggs, oil, vanilla, and lemon rind. Stir in the sugar. Add the flour mixture and stir until well combined.
Drop by heaping teaspoons onto baking sheets. Flatten each cookie a bit with the bottom of a glass that has been greased and dipped in sugar. Bake 8 to 10 minutes or just until starting to turn golden brown. Remove from the oven and sprinkle coarse sugar or more granulated sugar on top of the cookies. Allow to cool fully before serving or storing.