Preheat oven to 350�F. In large bowl, combine ground chuck, bread, lemon juice, onion, egg and salt. Mix well and shape into 6 individual loaves; place in gr eased 9x13" baking pan. Bake 15 minutes.
In small bowl, combine remaiing ingredients except lemon slices. Cover loaves with sauce and top each with a lemon slice; bake 30 minutes longer, basting occ asionally with sauce from pan. Serve sauce over loaves.