Best CrockPot roast ever!! 1 rump roast. Slice and stuff with onion and minced garlic. 1 can mushroom soup (recipe called for golden but I just used cream of). 1 packet of dry Lipton onion soup. 8oz coke. Cook on low for 8 hrs or high for 4 hours. Then add 8 oz of fat free sour cream to the gravy and mix together. Slice roast & spoon liquid over it. Cook for 1-2 more hours! Done! Yum yum yum!