In A 10-In. Ovenproof Skillet, Cook Onion Until Tender. Add Potatoes, Bacon, Ham And Beef: Heat Through. Remove From The Heat. In A Bowl, Beat Eggs: Stir In Parsley And Seasonings. Pour Into Skillet; Stir Gently To Mix. Bake, Uncovered, At 400 Degrees F For 20-30 Minutes Or Until A Knife Inserted Near The Center Comes Out Clean. Cut Into Wedges To Serve.