Lemon Bars with Olive Oil and Sea Salt

Ingredients

• For the crust
• 1-¼ cups all-purpose flour
• ¼ cup granulated sugar
• 3 tablespoons confectioners’ sugar, plus more for sprinkling
• 1 teaspoon finely grated lemon zest
• ¼ teaspoon fine sea salt
• 10 tablespoons cold unsalted butter, cut into cubes
• For the curd
• 4 to 6 lemons
• 1-½ cups sugar
• 2 large eggs
• 3 egg yolks
• 1-½ teaspoons cornstarch
• Pinch of fine sea salt
• 4 tablespoons butter
• ¼ cup fruity extra-virgin olive oil
• Confectioners' sugar
• Flaky sea salt, for sprinkling