I don't know what I was thinking. I had some beef and some mushrooms, so I made up a recipe. Will let you know how it turns out:
1 kg (2.2 lbs) stewing beef
650 g (1.5) lbs button mushrooms
300 mL beer
500 mL mushroom stock (can use beef stock)
2 strips pre-cooked bacon
Braise the beef in a bit of oil in small batches until brown on the outside. Throw into slow cooker. Saute the mushrooms and onion and mix in with the beef. Add beer and mushroom (beef) stock. Heat the bacon to remove the fat, chop into small pieces and add to the stock pot. Mix. Cook on high for 1 hr, then low for 3-4 hours.