Mixed Mushroom Rice

Mixed Mushroom Rice

3 cups chopped mixed mushrooms (white, portobello, shiitake, etc.)
1 medium onion, diced
1/2 stick butter
5 cups cooked white rice
Soy sauce, to taste
Salt
Freshly ground black pepper
1/2 cup sliced green onions

Saute the mushrooms and onion in butter in a skillet until soft. Stir in rice, soy sauce, salt and pepper, and green onions. Cook until warmed through