Product Recall: One SKU of Oscar Mayer Classic Wieners due to possible mislabeling. Click Here.
HEAT dressing in medium skillet on medium heat; add onions. Cook until soft, about 5 min., stirring occasionally.
DIVIDE the onions into 2 portions; top with cheese. Cook on low heat until melted.
SPREAD rolls with mayo; fill with spinach, turkey and ham. Top with onion-cheese mixture.