Made in a slow cooker, such as a crock pot, this breakfast can be cooked while you sleep - what a luxury!
Spray crock pot with non-stick cooking spray.
This is a layered dish: Place 1/3 of the potatoes into the bottom of the crock pot, followed by 1/3 of the onions, 1/3 of the ham, and 1/3 of the cheese. Repeat this step two more times ending with the layer of cheese.
Beat together the egg substitute, milk, salt, and pepper. Pour it over the layers in the crock pot. Cover and cook on low for 9 to 10 hours or overnight. Cut into 8 wedges when ready to serve.