2 to 3 lbs stew beef (or your favorite beef, I use tri-tip)
1 pkt onion soup mix
optional - Can of Mushrooms
Family Size Cream of Mushroom soup
A little black pepper
(Sometimes I'll throw in a splash of Red Wine too.)
Recipe
Layer them in the crockpot starting with beef and going down the line, cook on low for 8 hours.
It is so good over rice, but noodles would work as well.