Slow Cooker Cheesy Chicken and Rice

From Cassie Craves

2 to 3 boneless skinless chicken breasts
Salt and pepper to taste
2 to 3 tablespoons butter
1 medium onion, chopped (I think scallions would also work great)
1 10.5-ounce can cream of chicken soup
1 cup sour cream
1 cup cheddar cheese
1 15-ounce can whole kernel corn, drained
1 8-ounce box Zatarain's Yellow Rice Mix, cooked according to directions

1. Season chicken with salt and pepper and place in bottom of slow cooker. Top each breast with 1 tablespoon of butter. Scatter chopped onion over top.

2. Combine cream of chicken soup and sour cream and pour over chicken.

3. Cover and cook on low 7 to 8 hours or on high 3 to 4 hours.

4. A few minutes before serving, add in cooked rice, corn, and cheese. Stir to combine. Serve hot.