1 package stew meat (about 1 lb.)
4-5 potatoes, cut into chunks (either peeled or scrubbed first, I prefer skins on)
4-5 carrots, peeled and diced
1 large onion, diced
water (according to package directions)
1 package stew seasoning (McCormick does a good one)
Some packets have you brown the meat first, I've done it both ways. I don't notice much of a taste difference and it's easier to just throw the meat in the crock pot. I would put the potatoes and carrots in the crock pot first, because root vegetables take longer to cook and do better with more contact with the crock pot. Also, then they get all the good meat drippings on them. Then add the onion and meat. Sprinkle on the seasoning packet and pour on the water according to the packet directions. Cover and cook on low for a long time. The longer the better.
(photo courtesy of boudoir magazine via google images)