Layer the following in a greased crockpot:
Frozen hash browns
Chopped onions and/or peppers (fresh or frozen)
Cooked ham, bacon, and/or sausage
Shredded cheese
Cajun seasoning or seasoning salt
Next:
Beat eggs and pour over top of layers.
Cook on low at least 6 hours.
In a 6 qt. Crockpot, you can layer 3x and use 36 eggs to feed ~25 people.