Preheat oven to 350 degrees F (175 degrees C). Grease one 9×9 inch casserole dish and set aside.
Beat together the eggs and milk. Add seasonings and melted butter
Fold in ham, Cheeses and onion and spinach. Pour into prepared casserole dish.
Bake uncovered at 350 degrees F (175 degrees C) for 40 to 45 minutes.
Note: Mom and Dad were having trouble getting my great nephew to eat his protein. I taught him how to do the 2 egg version of this with eggs and cheese. Bake about 15-20 minutes. Now he gets up and makes it himself and gets them to put it in the oven. Problem solved.