I should have known better by looking at the seasonings - a little salt and a little curry powder. There is nothing to bring the flavors together. After following the recipe and ending up with tasteless bland, I went to Plan B. Added some garlic, ginger, soy sauce, and oyster sauce .... then it wasn't too bad. But as written, this recipe doesn't have much going for it.
I think this recipe has potential. I followed directions exactly, except omitting the mushrooms. I can imagine making it again, but with the following adjustments: use oil to saute the chicken, not butter. Saute the chicken on a higher temp in the oil. Then remove the chicken and using a little bit more oil, saute the broccoli, apples & celery, along with salt and curry powder. Take off the heat, then combine broccoli mixture with chicken mixture and put over the rice.