1/4 cup butter
1 cup sliced fresh mushrooms
1/2 to 3/4 cup chopped green pepper or celery
3 tablespoons flour
1 teaspoon salt
1/4 teaspoon white pepper
2 cups half-and-half
1 cup shredded Swiss cheese
4 cups wild rice (about 1 cup uncooked)
8 eggs
Add onion if desired