MELT butter in large saucepan on medium-high heat. Add onions and garlic; cook and stir until onions are crisp-tender. Stir in wine; simmer 5 min., stirring occasionally.
ADD flour; mix well. Gradually add milk, stirring until well blended. Cook until mixture thickens and begins to boil, stirring constantly. Boil 1 min.
STIR in remaining ingredients; cook until heated through, stirring occasionally.