This slow cooker breakfast casserole uses leftover corned beef and potatoes (corned beef hash) along with whatever vegetables you want to add in. Even though it’s egg-based, this tasty meal that can be served for breakfast, lunch, or dinner.
Did you celebrate responsibly?? I’m referring to St. Patrick’s Day being last night. I didn’t go out but I did make corned beef and cabbage. I don’t know about you but I’m sitting on a lot of corned beef leftovers. As usual.
Rather than fry up a corned beef hash in a skillet like I normally do, I figured I’d switch it up a bit and make a breakfast casserole instead…in my slow cooker.
Confession – this was a frittata but once I took it out the slow cooker it crumbled on me so I’m calling a casserole. But if you can get yours to look like a frittata then you can call it that.

before

after
Leftover corned beef. If you’re looking for a recipe, try my Slow Cooker Corned Beef & Cabbage. It’s healthy (whole30, paleo) and really easy. You make this with just corned beef, potatoes, eggs and herbs or you can add your favorite chopped vegetables. I added a bit of bell pepper and onion. Yes you can add cheese but I did not to because I wanted to keep this paleo and whole30 compliant.
Other St. Patrick’s Day recipes:
Slow Cooker Irish Dublin Coddle (Paleo, Whole30)
VIDEO: Slow Cooker/Instant Pot Low-Carb Corned Beef & Cabbage (Keto, Paleo, Whole30)
Slow Cooker Corned Beef & Cabbage Soup (Paleo, Whole30)
Slow Cooker Corned Beef & Cabbage (Paleo, Whole30)

Slow Cooker Corned Beef Hash Breakfast Casserole (Paleo, Whole30)
- Prep Time: 10 mins
- Cook Time: 3 hours
- Total Time: 3 hours 10 mins
- Yield: 4 servings 1x
Ingredients
- 6 large eggs
- 1/2 cup almond milk
- 1 cup cooked corned beef, diced
- 1/2 pound potatoes, peeled & diced
- 1/4 cup bell pepper, diced
- 1/4 cup onion, diced
- 1/2 teaspoon salt
- 1/4 teaspoon pepper
- 1/4 teaspoon garlic powder
Instructions
- Spray slow cooker generously with cooking spray.
- Add corned beef, potatoes, and seasonings to the slow cooker. Stir to mix well.
- In a medium size bowl, whisk together eggs and almond milk.
- Pour egg mixture into slow cooker.
- Cook HIGH 2-3 hours or LOW 4-6.
Like my Slow Cooker Vegetable Frittata recipe, I made this in my 2-quart slow cooker. You can easily double this if you have a 3.5 or 5-quart.

PIN FOR LATER
It’s made in a slow cooker, but this is gone so fast in my home. 😀 Great classic recipe which is the best comfort food! Love it!
Oh wow I don’t eat Corned Beef but my partner loves it and this would be his weekend in a dish – thanks for sharing
Laura x
Talk about Breakfast of Champions!! Im sure this recipe will be helping cure Irish hangovers nationwide! Thanks FSCQ!