Spray a 6 quart crock pot with non stick spray and turn to high.
Add onions to bottom of crock pot.
Place chicken breasts on top of onions.
Season with salt and pepper.
Add cheese to the top of chicken and then spoon soup on top to cover.
Next, add red beans and rice and chicken broth.
Cover and cook for 6-8 hours on high, 10-12 hours on low.
Adapted from my Crock Pot Cheesy Chicken recipe