Preheat oven to 350°F

Line a square pan with aluminum foil

For the crust: combine flours, brown sugar, cornstarch, lemon zest, baking powder and salt in a bowl. Mix until well combined before adding butter and yogurt. Mix lightly and press into even layer on the pan.

Bake until evenly browned 20-25 min. Cool for 15-20min. Reduce oven temperature to 325°F.

For filling: mix eggs, honey, lemon zest, flour and salt in bowl. Stir in lemon juice and pour over cooled crust. Bake until filling is set, 22min.

Cool completely before taking out of the pan and sprinkle with sugar.