Lemon Bars

INGREDIENTS

• 3 cups granulated sugar
• 6 extra-large eggs at room temperature
• 1/8 teaspoon kosher salt
• 2 tablespoons grated lemon zest (4 to 6 lemons)
• 1/2 pound unsalted butter, at room temperature
• 1 cup freshly squeezed lemon juice
• 2 cups flour
• Confectioners' sugar, for dusting
• 1/2 cup granulated sugar
• 1 cup flour