Prepare

• Heat oven to 350 degrees Fahrenheit. Combine your crust ingredients and once you have a dough, roll out to about ¼ of an inch and lay over a tart pan. Press dough down into the grooves of the pan before baking the crust for 10 minutes.
• While the crust is baking, prepare your filling. In a small bowl, beat the 4 egg yolks with ½ cup of sugar until it creates ribbons. Add lemon juice and zest.
• Place the bowl over a pot of simmering water and let the mixture heat up until it is uncomfortable to touch. Mix frequently.
• In a large bowl, combine egg whites and salt before beating into soft peaks. Add ¼ cup of sugar and then finish beating into stiff peaks.
• Fold the warmed yolk mixture into the egg whites until well combined.
• Lower the oven to 325 degrees Fahrenheit and pour the mixture into the tart crust. Bake for 30 minutes.
• Once cooled, top the tart with powdered sugar and whipped cream if desired, or take it a step further with a meringue.