A delicate shortbread crust topped with a tart-sweet, perfectly gooey lemon custard. My Mom's Lemon Bars are the best!
While base layer is baking prepare the topping. In medium sized mixing bowl, whisk eggs well. Add 2 cups granulated sugar and 1/4 teaspoon salt and whisk to combine. Whisk in lemon juice and lemon zest (if using). Finally, whisk in 1/4 cup flour until well incorporated. Pour over the warm, baked crust. Return to the oven for an additional 18 to 20 minutes at 350 degrees until topping appears to be set and is just beginning to lightly brown.