Preheat oven to 450 degrees.
Drain pears. Caramelize sugar with ¼ cup water until golden brown.
Pour caramel into the bottom of an 8½-inch round baking dish. Arrange pears, rounded side down on caramelized sugar.
Top with a second layer. Dot with butter. Bake 25 minutes. Bake pastry circle for 10 to 15 minutes or until golden brown. Place circle over pears.
Place serving plate over the top of pastry circle. Invert; remove baking dish.
Whip cream with sugar until firm. Garnish pears with whipped cream rosettes.