°1 box Chicken-flavor Rice-A-Roni 
°1 can Cream Mushroom Soup (10 oz Can)
°1 container Sour Cream
°1 whole Chicken
°1 container French Onions (6 oz Can)

* Methods 

Preheat oven 350 F. Preparing Rice-A-Roni according to pack methods . When that is cook, shred/cut up chicken (I always using a rotisserie chicken, but you could using leftover chicken or some cook and breasts, whatever), removing meat from bones. WhileWhen Rice-A-Roni is done, add the can of soup also sour cream, & stir to combine. Adding chicken and mix.
Spreading mix into a sprayed baking dish (9-by-13-inch pan), but you can using what you like for how thick you want it to be) also bake, un-covered, at 350 F for 40 min. 
Removing from oven, covering with french-friend onions also bake for 5 more minutes. Removing from oven & try not to eat thing.

Enjoy !