What do you consider cheap and what do you consider good? Winnipeg has all the standard chains. I'd stay away from the Swiss Chalet, though. Tiny birds, big prices.
Gondola Pizza has been there for 50+ years, if you like that. They have an Olive Garden near Polo Park, next to the Red Lobster. If you're down at the Forks, there are a couple of places that are unique, quaint and nice. If you're looking for a hot dog at the Forks, you can't go wrong with Skinner's foot longs.
Whereabouts are you going/staying in Winnipeg?