Food for post-workout

I eat a bananas too but I do it to avoid muscle cramps and soreness. It doesn't have to be bananas but anything high in K will help keep away the soreness. It is an essential eloctrolyte for your muscles/nerves and keeps them from getting stiff. That way i can work out the next day with no aches or pains and avoid sudden cramps resulting in injury.

As far as protien and carbs I just finished reading an artical on Sparkpeople that stated a good post workout meal/snack should be half of the calories you burned, 60% of the calories from carbs, %30 percent of the calories from protien and a little fat is ok but does not help/harm either way. I don't know if this is correct but it is the artical I just read because I had the same question.

Here is an artical about K, don't let some dude at a store make you feel like you are doing things wrong (that's for your doctor or trainer to help you with): http://www.wisegeek.com/what-are-the-effects-of-potassium-deficiency.htm