This fluffy oven-baked omelet casserole is the easiest way to make an omelet. It contains protein-packed eggs, tender ham, fresh bell peppers, and wholesome mushrooms. It is perfect for breakfast, brunch, or supper. Make this ahead of time and store it in the fridge for a quick breakfast on busy mornings, perfect for back to school. It takes less than 15 minutes to prep, and then you pop it in the oven to bake. Set the timer and forget it. Plus, it tastes SO good.
This is such an EASY way to prepare eggs. It doesn't get any easier, plus it's healthy, high in protein, and low in carbs.
This is a healthy breakfast idea that you should keep in mind when you are pressed for time. It can easily be adjusted to make for a larger or smaller crowd.
This egg casserole is filling and satisfying. It bakes up to a puffy, golden casserole that your whole family will love. Eat it as is, or put it inside a wrap for a healthy breakfast.
Plus, you don't have to stand at the stove waiting for it to cook like you do when cooking a regular omelet.
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🥘 Ingredients
- Eggs. According to Web MD, eggs have so many health benefits. For instance, eggs have more nutrients -- such as vitamins, minerals, amino acids -- per calorie than most other foods, are high in protein, help your good cholesterol and lower triglycerides, lower your chance of having a stroke, are heart-healthy, help your eyes, and sharpen your brain.
- Milk. I use 1% milk, but you can use almond milk, coconut milk, or oat milk.
- Shredded cheese. I use white cheddar cheese, but you can use your favorite kind. It would be great with sharp cheddar, gouda, swiss, mozzarella, or even feta.
- Diced ham. Ham goes great in an omelet, just make sure it is already precooked. You could also use bacon, thinly sliced cooked steak, cooked sausage, leftover chicken, or salmon.
- Mushrooms, bell peppers (I used green, yellow, and orange). You can also use spinach, tomatoes, and leeks. Look in your fridge and use up anything that you have sitting in the crisper.
This omelet is easy to modify to suit your tastes. Are you a vegetarian? Leave out the meat. Do you want to make it healthier? Add more vegetables. The sky is the limit for what you can do with this baked oven omelet.
🍳 Instructions
This oven-baked omelet is really easy and takes very little prep time. First, you preheat the oven, whisk together the eggs, add the milk, seasoning salt, pepper. Next, stir in ham, cheese, peppers, and mushrooms. Pour the mixture into a greased 9 x 12 baking dish, and bake for 45 minutes at 350 degrees. Cut into squares and serve. Easy right?
Whisk together the eggs until light and fluffy 
Mix in shredded cheese, mushrooms, peppers, and ham 
Pour mixture into a greased 9 x 12 baking pan Bake in the oven at 350 for 45 minutes 
Bake until eggs are set, and it is golden brown on top Cut into slices. Enjoy!
📖 Variations - What else can you add?
- Crisp bacon.
- Tomatoes.
- Fresh herbs.
- Spinach.
- Onions.
- Garlic.
- Zucchini.
- Celery.
🥗 Side dishes
- Avocado.
- Fruit.
- Tomatoes.
- Crispy oven-roasted potatoes or hashbrowns.
- Salad.
- Toast.
- English muffin.
- Pancakes.
- French toast.
FAQs
Yes, omelets can be part of a balanced diet. They are mainly composed of eggs that are nutrient-dense, heart-healthy, and an excellent source of protein.
However, how healthy they depend on what you put into your omelet. For example, if you add lots of vegetables to your omelet, it will contain fiber, vitamins, and minerals.
Because this omelet is oven-baked and not fried, there is no added fat with oils to add calories.
Omelets are also part of a diet that can help you lose weight. According to Business Insider, eggs are a superfood high in amino acids, which help boost your metabolism and burn calories. Eggs are also low in calories and help you feel fuller longer. If you eat an omelet full of vegetables, it is a great meal to have if you want to lose weight. Just leave out the add-ins that increase fat and calories, such as cheese and ham.
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📋 Recipe
Fluffy Oven-Baked Omelet Casserole Recipe
Ingredients
- 12 eggs
- 1½ cup milk
- ¾ teaspoon seasoning salt
- 1½ cup diced ham
- 1 cup shredded cheddar cheese
- 1½ cup finely chopped bell peppers
- 1 cup mushrooms
- ¼ teaspoon black pepper
Instructions
- Preheat oven to 350 degrees
- Whisk together the eggs.
- Add milk and seasoning salt.
- Stir in ham, cheddar cheese, bell peppers, and mushrooms.
- Pour into a greased 9 x 12 baking dish.
- Bake at 350 degrees for 45 minutes until golden brown on top and eggs are set.
- Cut into squares and serve.
- Enjoy!
Linda
This omelet casserole is delicious! So flavorful and easy to prep and clean up.
Amy
This was such a great idea and honestly, so much easier, especially when I'm feeding quite a few people. I especially loved it because it enabled me to get rid of some of the vegetables that were in the fridge. They were fluffy as you said and you're right, high in protein and low in carbs is such an added bonus.
Kay
A great recipe that even my fussy eater daughter enjoyed! Is now a weekly meal in our house.
Freya
How delicious and cheesy this looks! And so easy too!
Nora
Yum! This looks so delicious! Can't wait to try it out and have a bite! Thank you for sharing!
Jean
when I first saw the photo I knew it already looks delicious and can be served on occasions too!
Mihaela | https://theworldisanoyster.com/
I used to make oven-baked omelettes (when I had more time at hand, LOL), and spinach and courgettes were always among the ingredients. Broccoli too, since my fussy eater likes it, paradoxically:) You just reminded me how nicely they turn up!