Directions Preheat oven to 400degrees. In a large skillet, heat butter over medium heat. Add mushrooms and onion; cook and stir until tender. Stir in thyme, lemon juice, hot pepper sauce and salt. Cool completely. Unfold one pastry sheet. Spread half of the mushroom mixture to within 1/2 in. of edges. Roll up the left and right sides toward the center, jelly-roll style, until rolls meet in the middle. Cut into 24 slices. Repeat with remaining pastry and mushrooms. Place on greased baking sheets. In a small bowl, whisk egg and water; brush over pastries. Bake 15-20 minutes or until golden brown. Serve warm or at room temperature. Freeze option: Freeze cooled appetizers in freezer containers, separating layers with waxed paper. To use, preheat oven to 400°. Reheat appetizers on a greased baking sheet until crisp and heated through. Yield: 4 dozen. Originally published as Mushroom Palmiers in Taste of Home December/January 2013, p52