Preheat oven to 350F. Melt 2 tb butter in skillet and saute apples for a minute, just until softened. Cool. Grease a cookie sheet with remaining butter. Arrange the apples in the center of the 4 puff pastry circles. Fold the circles in half and pinch the edges closed with your fingertips or a fork. Brush on the egg sparingly on the tops of the turnovers. Place on greased cookie sheet and bake for 8 to 10 minutes until the pastry has risen and is golden brown. Serve warm.
