Wipe, and remove thin slices from stem end of six medium-sized tomatoes. Take out seeds and pulp, sprinkle inside of tomatoes with salt, invert, and let stand one-half hour. Cook five minutes two tablespoons butter with one-half tablespoon finely chopped onion. Add one-half cup finely chopped cold cooked chicken or veal, one cup stale soft bread crumbs, tomato pulp, and salt and pepper to taste. Cook five minutes, then add one egg slightly beaten, cook one minute, and refill tomatoes with mixture. Place in buttered pan, sprinkle with buttered cracker crumbs, and bake twenty minutes in a hot oven.