This isn't a traditional stew recipe, by any means, but this is what I've done in the past.
2 packets of McCormick (or other brand) brown gravy
6 potatoes, peeled and cut into chunks (or you can just scrub them, and leave the skin on)
1 good sized onion - wedged
carrots (baby carrots if you are in a hurry)
mushrooms (fresh, cleaned, and sliced - buy pre-sliced if in a hurry)
any other veg you might like in stew (if you use canned green beans or peas, add them about 15 minutes before serving)
Throw everything except any canned veggies into the crockpot. Mix up the gravy mix and 2 cups water, pour over all of the stuff in the crockpot, and stir until food is coated. Turn crockpot on, cover, and stir once about halfway through. Stew is done when the potatoes are done (according to me, anyway, LOL). Serve with fresh bread or biscuits, and enjoy lots of leftovers.
Like I said, this is just the way I make it, and it's nothing special. Most of the time, I have to leave out the carrots because my son doesn't like them. Now I'm going to have to make stew!