Place a layer of frozen potatoes on the bottom of the slow cooker, followed by a layer of sausage, then onions, green pepper and cheese. Repeat the layering process two or three more times, ending with a layer of cheese.
In a large bowl, beat the eggs, milk and salt and pepper together. Pour over the cheese layer, cover and cook on LOW for 8-9 hours. Serve in or with warm tortillas.
1 lb. cooked ham, cubed, OR 1 lb. bacon, diced, cooked and drained, can be substituted for sausage.