Add in the cooked turkey/sausage, followed by peppers, green onions and crumbled cheese.
Pour the beaten egg mixture over the top of all your layers.
Cover with the lid and cook on LOW for 3-4 hours or on HIGH for 1-2 hours, until eggs are fluffy and fully set in the center.
The casserole may easily burn along the edges a little bit so please keep an eye on your crockpot for the last hour of cooking. I REALLY prefer the LOW setting for this reason.
Once finished cooking, turn off the pot and allow it to cool for a while. As it cools down, the edges will detach from the pot, making it easy to transfer to a serving dish.
Slice and serve immediately. Enjoy!