1 (9 inch) pie shell
1 lb. fresh mushrooms, sliced
1/4 c. green onions, sliced
1 tbsp. butter
4 oz. shredded Swiss cheese
4 eggs, beaten
1 c. half and half, light cream or milk
1/4 c. grated Parmesan cheese
1/2 tsp. salt
1/8 tsp. pepper

In a skillet over medium heat, cook mushrooms and onion in butter until mushrooms are lightly browned, six to eight minutes. Spread mushroom mixture evenly in bottom of pie shell. Sprinkle Swiss cheese over mushroom mixture. Beat together remaining ingredients until they are well blended. Pour over mushroom mixture and cheese. Bake in preheated oven (375 degrees) until knife inserted in center comes out clean, 30 to 40 minutes. Let stand five minutes before serving.