Use heart-shaped or round molds, and brush the inside of each with a little butter.
04Lay out a 16-inch square of plastic wrap on a flat surface, and place one pastry patty in the center. Cover with a second square of plastic wrap. Roll out each round of pastry into a large 1/8-inch-thick circle of dough. Cut each circle into thirds. Lay one portion of dough on top of each individual mold, pressing the dough lightly to line each mold. Leave the outside edges overhanging and trim off the edges at the lip of the mold. Bake about 10 minutes, and let cool.05Slice the mushrooms into bite-size pieces. There should be about 2 quarts, loosely packed.06Heat the butter in a heavy skillet, and add the onions, thyme and ham. Cook for about a minute, and add the mushrooms and Sherry. Bring to a boil, and cover closely. Cook over moderate heat for about 2 minutes, and add the cream, salt and pepper. Continue cooking, uncovered, over high heat 5 to 7 minutes.07Remove the pastry shells from the molds. Heap the mushrooms inside the pastry shells and serve.