Spray inside of crockpot.

Place one third of the potatoes in the crockpot. Add one third of the ham, onion, green pepper, mushrooms and cheese. Repeat layers, ending with the cheese.

In a large bowl, whisk together the eggs, milk and seasonings until well mixed. Pour over the ingredients in the slow cooker and cover.

Turn on low. Cook for 8-10 hours on low or until casserole is set and eggs are thoroughly cooked.