2 cups thinly sliced, peeled apples (about 2 medium)
1/3 cup sugar
2 tablespoons all-purpose flour
1/2 teaspoon ground cinnamon
1 egg, lightly beaten
1 tablespoon water
Combine 1 cup flour, undissolved yeast, 2 teaspoons sugar and salt in a large mixer bowl. Heat water and butter until very warm (120 to 130°F); butter does not need to melt. Stir into flour mixture. Stir in enough remaining flour to make soft dough. Knead on lightly floured surface until smooth and elastic, about 4 to 6 minutes. Cover; let rest 10 minutes.
Combine apples, 1/3 cup sugar, 2 tablespoons flour and cinnamon in a bowl; toss to coat evenly. Set aside.
Divide dough in half. Roll each to 10-inch square; cut into 4 (5-inch) squares. Place about 1/4 cup filling onto center of each. Bring corners up over filling; pinch together to seal. Transfer to large greased baking sheet. Cover; let rise in warm, draft-free place until doubled in size, about 20 to 40 minutes.
Combine egg and water in small bowl; brush onto tops of pockets. Sprinkle with sugar. Bake at 375°F for 20 to 25 minutes or until golden brown. Remove from pan; cool on wire rack.