Fry sausage in a large pan until cooked. Move to paper towel to drain excess grease, and in same pan, saute ½ cup onion and ½ cup green pepper until soft.
Mix sausage, onion, green pepper, and hash browns together and spread evenly into a 9x13 pan. Sprinkle two cups grated cheese over the top.
In separate bowl, whip eight large eggs, and 1 and ¼ cup milk, salt and pepper together, and pour over hash brown mixture.
Put in fridge overnight or for at least two hours. Bake at 350 degrees for 55 minutes or until eggs are set