In saucepan, combine undrained mushrooms and the onion slices; cook covered over low heat for 5 minutes. Add sherry or wine, water, and bouillon granules; stir in meat. Cover; cook for 5 minutes. Combine sour cream and flour. Stir a small amount of the hot mixture into the sour cream; return all to saucepan. Cook and stir till thickened and bubbly. Cook and stir 1 to 2 minutes more.
Serve over hot cooked noodles.
Cajun Country -- New Iberia, Louisiana