Sago
Never just chuck wine in a casserole!
You should use the wine to de glaze the pan you have used to fry the meat and onions.
The wine must reach a high temperature to burn off the alcohol.
Wine will work well with mushrooms and onions with a bouquet garni of thyme and bay.
If you are using root vegetables leave out the wine and add a dollop of French mustard.
Oh, you old purist, you 
Alcohol burns off at 78c, apparently (I've been googling) and the longer the cooking time the more is burnt off. So long slow cooking at simmering point will take care of the alcohol whether it's used for deglazing or just sloshed in.
I always fry my onions and meat first (catering trained, and that's how my mum did it...) but not everyone does; I'm sure they're perfectly happy with the results.
Anyway, there's lots here for the OP to choose from.
Bon appetit, GagaJo