Saute onion and green pepper in butter. Add broccoli and hash browns and cook until thawed and warm. Add ham and mushrooms and turn off heat. In bowl, combine eggs, milk, and cheeses. Pour eggs over veggies and mix well. Pour into greased pie pan and bake at 350 for 35-40 min.
I have put this together with everything still frozen, but it needs to cook 10-15 minutes longer.
You can subtitute or add any meat or vegetables you have, it's a great throw together meal to get rid of leftovers!