Quick & Delicious Breakfast Casserole: With Endless Customizable Options

plate of breakfast food

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Making healthy breakfast ahead of time means my husband can eat before he quickly heads out the door in the morning, without having to stop for a snack on the way to work!

We save money and eat healthier, and that’s what I’m all about!

This casserole is filling, quick, packed full of protein, and super easy to customize.

breakfast casserole on spatula

I like to make a pan at the beginning of the week and then heat some up each morning fast since its already prepared!

How I make this recipe is just a TAD spicy, (it has a whole tsp of red pepper flakes,) but you can totally reduce or omit the spices to make it more mild for you. We just like a little kick to wake up in the morning 😉

If you do prefer less spicy dishes, you can use onion, garlic, dill, a dash of cumin, or whatever other herbs or spices you think would make it delicious instead.

(We just happened to be out of onion and garlic powders when I made this recipe, but they would definitely be good options.)

A side note about my spices…

I usually buy spices in bulk and don’t want to keep them in the plastic bags they come in, so I got these glass jars which I have been LOVING!

spice jars

Keeping my spices in these jars keeps them super fresh because of the rubber gasket on the lid, and the labels on top make them easy to find.

I also love how cute they are, all the colors and textures of the spices are so pretty in the pantry!

The customizations are endless on this one. Use this recipe as a base and add or exchange other vegetables to suit your tastes or fridge-contents!

Some great ideas to customize it are:

  • Change the cheese, try pepper-jack or Swiss!
  • Try turkey sausage instead of pork sausage
  • Throw some tomatoes on top
  • Add slivered red onion
  • Add Chopped green onions or scallions
  • Try Bacon pieces instead of sausage
  • Replace the baked potato for baked Sweet potato
  • Add Roasted Asparagus tips (for some reason that just sounds so good to me!)

You can really make it yours!

breakfast casserole

Here’s a secret tip I love to implement in my casserole baking:

After you sprinkle on the cheese on top, you need 3 more “layers”:

  • Something green
  • Something red
  • Salt and pepper

For something green I love to use dried parsley from my garden, chives, basil, cilantro, dill, whatever I have on hand.

The something red can be chili powder, paprika, cayenne, etc.

After you broil it to give the top some color, those spices just add such a nice texture and it looks DELICIOUS

(I use this method on enchiladas too!)

One more note before the recipe is this:

I think it is a little easier to grate a cold leftover baked potato, but you can totally just ‘bake’ one in the microwave real fast and mash or grate that. It will work both ways! Honestly I bet even mashed potatoes would taste great!

I even like this recipe cold. 😉


breakfast casserole

Quick & Delicious Breakfast Casserole

This protein packed breakfast casserole is super quick, easy, and has endless customizable options!
Prep Time 10 minutes
Cook Time 25 minutes
Course Breakfast
Servings 4


  • 1 lb sausage
  • 1 bell pepper
  • 1 clove garlic
  • 1 large baked potato
  • 1 cup shredded cheddar cheese
  • 1 tsp salt
  • 1 tsp red pepper flakes (may reduce to 1/2 or omit)
  • 5 large eggs


  • Preheat the oven to 350°
  • In a medium sized skillet, brown the sausage until it is thoroughly cooked. You can sear it to give it some color and additional flavor .While the sausage is cooking, chop and mince the pepper and garlic.
  • Scoop the cooked sausage into an 8×8 or 9×9 casserole dish. Leave the sausage fat in the pan, and use it to cook the peppers and garlic until soft.
  • Pour the peppers and garlic into the casserole dish, on top of the sausage.
  • Grate or mash the baked potato and sprinkle it into the dish as well.
  • Crack the eggs into a bowl and add the salt, red pepper flakes, and any other spices you desire. Whisk until the yolks are mixed, then pour over top of everything in the casserole dish.
  • Give it all a little stir to make sure the eggs spread out evenly. The sausage and vegetable layers don’t need to be thoroughly mixed unless you'd like them to be, but the eggs need to saturate to the bottom of the pan.
  • Sprinkle the grated cheese on top, then use a spoon or spatula to push it down all over. It will float back to the top a bit, that’s okay.
  • Top with salt, pepper, and any other spices you like.
  • Bake for 20 minutes or until cheese is melted and it is heated through.
  • Once it is baked, switch the oven to broil and broil it for 3-5 minutes until there is nice color on top.


You may exchange the veggies for what you have on hand or prefer. 
You can mix up the spices, try onion powder, cilantro, or thyme.
You can use turkey sausage or bacon in place of the pork sausage.
Keyword Eggs

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