I found this recipe on Beth's Mess. It's really simple but we really like it.
Here's the original recipe that Beth shared.
4 frozen chicken breasts
1 package dry Italian dressing mix
1 c. warm water OR chicken broth
1. Place chicken in cooker.
2. Sprinkle dressing mix on top.
3. Pour water/broth over chicken; cover.
4. Cook on low 8-10 hours.
My alterations: I used frozen chicken tenderloins (it doesn't have to cook quite as long). I also add a can of cream of chicken or celery because I like the sauce a little thicker to put on the rice or noodles.