Cook the breakfast sausage in a skillet until browned.
In a large bowl, whisk the eggs and milk together until well combined.
Add the shredded hash browns to the egg mixture and stir gently.
Incorporate the cooked sausage, bell peppers, and onions into the mixture.
Season the mixture with salt and pepper to taste.
Grease the crockpot with cooking spray or butter.
Pour the egg mixture into the crockpot evenly.
Sprinkle the shredded cheddar cheese on top.
Cover with the lid and set the crockpot on low.
Cook for 6 to 8 hours, or until the eggs are set and the top is golden.