Casserole Apple Pie

Ingredients

• 5 large apples
• 1 cup sugar
• 1/4 cup all purpose flour
• 1 teaspoon cinnamon
• 1/2 teaspoon salt
• 1 tablespoon maple syrup
• 1 tablespoon butter or margarine
• 1 recipe pie crust pastry for 2-crust pie
• 1 tablespoon additional sugar