Combine onions wine and butter in 2-quart covered dish Cook on High 100 power for 10 to 12 minutes or until tender stirring once halfway through cooking time
Stir in flour and seasonings
Cook on High 100 power for 30 seconds
Slowly stir in milk and sour cream
Cook on High 100 power for 4 to 6 minutes or until thickened
Sprinkle shredded cheese over top Cook on Medium 50 power for 4 to 6 minutes or until cheese melts