Heat the oven to 200ºC . Cut each of the squash in half and remove the seeds and fibers. Place the squash, cut sides down, in an ungreased baking pan. Then add water to the depth of 1 cm and bake, uncovered, until the squash is tender, about 30 to 40 minutes. While the squash is baking, cook and stir the meat in a large skillet until it is brown. Drain off the excess fat. Remove the skillet from the heat and stir in the 1.5 ts of salt as well as the cinnamon, the coarsely chopped tart apples and the raisins. When the squash is cooked, turn them so that the cut side is up and remove them to a platter. Drain off any remaining liquid in the pan and dry. Scoop out the pulp from the acorn squash, making a shell that is 1 cm thick all the way around. Season the shells with salt to taste. Mash the pulp and mix in the meat mixture. Return to the shells, piling them full and sprinkle with 1 tb of brown sugar on each. Drizzle with the melted butter. Bake uncovered until the apple is tender, about 20 to 30 minutes. Serve hot. NOTE: You can substitute a combination of half lb lean ground beef and half lb of bulk pork sausage for the 1 lb of lean ground beef.