2Heat oil in skillet over medium heat. Sauté onions and green pepper; 3-5 minutes. Set aside, to cool.
3Layer in the crock pot; 1 1/3 cups hash browns on the bottom. Layer 1/3 of the bacon on top of the hash browns, then layer 1/3 of the onion mixture and 1/3 of the cheese. Continue the layers in the same order and amounts.
4In a large mixing bowl whisk eggs and milk until smooth. Pour over the layers in the crock pot. Cover and cook overnight on low; or 5 hours on high.