Preheat oven to 350°F Prepare Rice-A-Roni according to package directions. While that is cooking, shred/cut up the chicken removing meat from bones.
When Rice-A-Roni is done, add the can of soup and the sour cream, and stir to combine. Add the chicken and mix together. Spread mixture into a sprayed baking dish and bake, uncovered, at 350 F for 40 minutes.
Remove from oven, cover with the french-friend onions and bake for 5 more minutes.