If using bacon or sausage, cook and crumble.
Grease a 6qt slow cooker. Place half of the hash browns, meat, onions, cheese and peppers. Repeat layers ending with cheese,
Whisk eggs, milk, dry mustard and salt & pepper in a medium bowl. Pour egg mixture over the remaining ingredients.
Cook on Low for 7-8 hours or high for 2 1/2 – 3 hours.
(Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.)