COOK beans and cranberries in simmering water in skillet 4 to 5 min. or until beans are crisp-tender; drain. Rinse with cold water; drain again.
MELT butter in large nonstick skillet on medium heat. Add onions and sugar; cook and stir 5 min. Add bean mixture; cook and stir 3 min. or until heated through.
ADD dressing; cook and stir 1 min. Top with nuts.