My Grandmother Tuttle started making this during my teenage years. I'm not sure where she got the recipe but everyone loves this stuff. Very simple and a great change from regular rice. So easy to make and just toss it in the oven.
- Melt butter in 1.5 quart casserole dish.
- Mix in all other ingredients.
- Bake at 350 degrees for 1 hour.
- I usually stir it after 20 or 30 minutes to mix up the onions and mushrooms, but it's not required.