Instructions
Step 1: Make the Apple Filling
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In a large bowl, combine the sliced apples, sugar, flour, and cinnamon. Toss until all the apple slices are evenly coated. Set aside while you prepare the crust—this gives the apples time to release some of their juices.
Step 2: Prepare the Crust
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In another mixing bowl, whisk together the flour, salt, and sugar. Cut in the shortening with a pastry cutter or fork until the mixture resembles coarse crumbs. In a measuring cup, combine the two egg yolks and add enough water to reach 1 cup. Stir this into the flour mixture until a dough forms. Divide the dough in half.
Step 3: Roll Out the Bottom Crust
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Roll one half of the dough into a rectangle large enough to fit a 10×15-inch jelly roll pan with sides. Carefully lay it into the pan, pressing it evenly across the bottom and slightly up the edges.
