Melt the butter in an 8x8 inch pan. Beat the eggs, add sour cream, milk, salt and pepper. Beat again and pour in pan. Sprinkle with onion, green pepper and mushrooms. Bake at 325 degrees for 35 to 45 minutes. During the last minutes of baking, sprinkle with 1/2 cup of grated cheese and 1/4 of crushed fried bacon. Cut in squares and serve. Randy Rigg