Meanwhile, heat stew as directed on pouch. Mound baked potato wedges in 10-inch ovenproof skillet. Sprinkle 1 cup of the Cheddar cheese over wedges. Pour stew over cheese and wedges. Top with remaining Cheddar cheese. Bake 5 to 7 minutes longer or until cheese is melted. Top with blue cheese and onions. Serve immediately.