Traditional lemon bars balance the tangy sweetness of lemon curd with a rich shortbread crust. This recipe adds extra notes of flavor to the mix: the compelling bitterness of good olive oil and a touch of sea salt sprinkled on top. They lend a mild savory character to this childhood favorite, making it a little more sophisticated than the usual lemon bar, but just as compelling. Choose an olive oil with personality, otherwise you’ll miss the point. Something herbal and fresh tasting with peppery notes works best. Although the bars will last up to five days when stored in the fridge, they have the brightest flavor when eaten within 24 hours of baking.