I found this to be wonderfully simple, delightfully tasty, and healthy. It took me about 20 minutes to put it all together plus the dishes are easy to clean up.
Leftovers make a great lunch snack too.
Drain chicken and set aside to cool. Optionally, rinse out the container you used to cook the chicken. Add butter and allow to melt. Allow mushrooms to cook until soft. Add mushrooms to the chicken and set aside to cool.