Easy Apple Tart

Ingredients

• pie crust, : (My No Roll Pie Crust)
• 1 1/2 cups flour
• 1 teaspoon salt
• 2 teaspoons sugar
• 1/2 cup oil
• 2 tablespoons milk
• Filling
• 2 granny smith apples (very large apples, skin on, core and sliced thinly, 24 slices per apple)
• 2 teaspoons flour
• 1/2 teaspoon cinnamon
• 1/4 teaspoon salt
• 1 teaspoon lemons or 1 teaspoon lime juice
• 4 tablespoons sugar
• 1 egg, separated
• Topping
• 1 teaspoon sugar (coarse crystal or turbinado, more or less to taste)
• 1/4 teaspoon cinnamon (more or less to taste)