One of my favorites, and it's very easy! Taco Soup.
1lb ground beef
1 packet ranch seasoning
1 packet taco seasoning
1 can pinto beans
1-2 cans diced tomatoes (I use two, to make more)
1-2 cans chili
1 can of corn (I tend to use 1 bag frozen corn)
shredded cheese and sour cream to top.
ground the beef in a pan with the taco and ranch seasoning, then mix it with the other ingredients in the crock pot and turn on low for about 5-6 hours. Smells so good as it cooks.
And oh, I love crock pot liners. Saves time on cleanup.