Mix cooked rice, raw mushrooms and basil together and spread out evenly in a shallow casserole dish.
In a medium sized mixing bowl, whisk together the egg whites (or eggs), parmesan cheese and milk.
Pour over the rice and bake for about 30 minutes.
Note: Keep an eye on this in the last 10 minutes of baking. If the rice appears to be getting too browned, place a piece of foil loosely over the top of the dish.
Notes
Please note that the nutrition data given here is a ballpark figure. Exact data is not possible.