Dreamy Lemon Meringue Bars to Brighten Your Day - Worth Pinning

Ingredients

• 2.25 cups shortbread cookie crumbs
• 8 ounces (225 grams) shortbread cookies
• 3 tablespoons unsalted butter, melted
• 1.5 cups granulated sugar
• 4 large eggs, at room temperature
• 0.5 cup freshly squeezed lemon juice
• 3-4 lemons
• 1 medium lemon zest
• 1 small pinch of salt
• 4 large egg whites, at room temperature
• 0.75 cup granulated sugar
• 1 pinch cream of tartar (optional)