Add the butter to a slow cooker bowl and let it melt. Alternatively, melt some butter using the Saute function of an Instant Pot. Spray the bowl with additional non-stick spray.

Add the ham, and green onions to the bowl.

Beat the eggs and cream together in a jug, then pour it over the ham.

Add the cheese and black pepper, then stir well to mix.

Cook on high for 1 hour and stir well to ensure even cooking (use the slow cooker function if you're using an Instant Pot).

Cook on high for another 15-30 minutes, depending on how firm you prefer the eggs to be cooked.