Brown ground beef in 12-inch skillet over medium-high heat, stirring occasionally, about 5 minutes; drain. Spoon ground beef into large bowl. Heat olive oil in same skillet over medium heat and cook onion, stirring occasionally, 2 minutes or until tender. Add onion to beef.
Cut thin lengthwise slice off eggplant; remove pulp leaving 1/4-inch shell. Sprinkle shell, if desired, with 1 teaspoon salt. Coarsely chop pulp.
Combine beef mixture, eggplant pulp, 1 cup Pasta Sauce, bread crumbs, Wish-Bone® House Italian Dressing and parsley in large bowl. Stuff eggplant with beef mixture, then top with remaining 1/4 cup Pasta Sauce. Bake uncovered 30 minutes or until eggplant is fork-tender.