Select large cucumbers of uniform size. Cut them in two lengthwise. With a spoon remove carefully the seeds, and fill the place with a stuffing made of equal parts of minced chicken, or any meat, and soft crumbs, seasoned, and moistened with one egg and a little stock. Round it over the top, and sprinkle with crumbs. Place the pieces in a pan with enough stock to cover the pan one half inch deep. Cook in a moderate oven one hour, or until the cucumbers are tender; replenish the stock in the pan if necessary. Remove them carefully to a hot dish. Thicken the gravy in the pan with a little cornstarch, and pour it around, not over them. This dish can be served as an entree.