Whisk together eggs, milk and seasonings in a large mixing bowl. Fold in hash browns, cheese (if you like a cheesier dish, use 2 cups cheese), onion mixture and bacon.
Transfer to prepared baking dish and bake uncovered for 45-55 minutes or until the center comes out clean when inserted with a knife.
Notes
Additional Mix-ins: Try using breakfast sausage in place of bacon (or use both!). Try adding in mushrooms, green onions or chives and some sweet red pepper instead of the green pepper.
Recipe by The 36th AVENUE at https://www.the36thavenue.com/brunch-casserole-recipe/