Sausage and Egg Whole30 Breakfast Casserole Recipe
Introduction
This Sausage and Egg Whole30 Breakfast Casserole is a hearty and flavorful way to start your day. Packed with sausage, fresh veggies, and eggs, it’s perfect for meal prep or feeding a crowd. Plus, it’s Whole30-approved and easy to customize.

Ingredients
- 1 pound Whole30 approved breakfast sausage or turkey sausage (if not Whole30)
- Olive oil for pan
- 1 white or yellow onion, diced
- 1 green bell pepper, diced
- 1 red bell pepper, diced
- 2 cups fresh spinach, chopped (or 16 ounces frozen, thawed and drained)
- 1/2 tsp garlic powder
- 1 tsp salt-free Mrs. Dash Onion & Herb Seasoning, plus extra to sprinkle on top
- Salt and pepper, to taste
- 12 large eggs
- Hot sauce (optional, to taste)
Instructions
- Step 1: Preheat your oven to 350 degrees Fahrenheit.
- Step 2: Dice the peppers and onion, then chop the spinach. Set all aside.
- Step 3: In a medium bowl, crack the 12 eggs and whisk well. If you like, add a few drops of hot sauce and whisk to combine.
- Step 4: Heat a little olive oil in a large skillet over medium-high heat. Cook the sausage until fully cooked, then drain and set aside.
- Step 5: In the same skillet, cook the diced peppers and onion over medium heat until slightly softened, about 2 minutes. Add the chopped spinach and cook for an additional minute. Remove from heat.
- Step 6: Return the cooked sausage to the skillet with the veggies. Add garlic powder, Mrs. Dash seasoning, salt, and pepper. Stir well to combine.
- Step 7: Pour the sausage and vegetable mixture into a 9×13 glass baking dish lightly coated with olive oil.
- Step 8: Pour the whisked eggs evenly over the sausage and veggies. Sprinkle additional Mrs. Dash Onion & Herb Seasoning on top.
- Step 9: Bake for 25-30 minutes, or until a knife inserted in the center comes out clean.
- Step 10: Let the casserole cool for 5-10 minutes before slicing. Serve with salsa if desired and enjoy!
Tips & Variations
- Use fresh spinach for a brighter flavor, or frozen spinach for convenience—just be sure to thaw and drain it well.
- Swap bell peppers for other veggies like mushrooms or zucchini to suit your taste.
- Add fresh herbs such as parsley or chives on top after baking for extra freshness.
- For a spicier dish, increase the hot sauce or add red pepper flakes to the egg mixture.
Storage
Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat individual servings in the microwave until warm. This casserole also freezes well—wrap tightly and freeze for up to 3 months. Thaw overnight in the fridge before reheating.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I make this casserole ahead of time?
Yes, you can assemble the casserole the night before and keep it covered in the fridge. Bake fresh in the morning, adding a few extra minutes to the baking time if going in cold.
Can I use a different type of sausage?
Absolutely. Choose your preferred Whole30-approved sausage or any other favorite breakfast sausage. Just make sure it’s fully cooked before adding to the casserole.
Print
Sausage and Egg Whole30 Breakfast Casserole Recipe
- Total Time: 40 minutes
- Yield: 12 servings 1x
- Diet: Whole30
Description
This Sausage and Egg Whole30 Breakfast Casserole is a hearty, protein-packed morning meal perfect for meal prep or a family brunch. Combining savory Whole30-approved sausage with fresh vegetables and eggs, this easy-to-make casserole offers a flavorful and nutritious way to start your day, all while adhering to Whole30 dietary guidelines.
Ingredients
Protein and Eggs
- 1 pound Whole30 approved breakfast sausage (or turkey sausage if not Whole30)
- 12 large eggs
Vegetables
- 1 white or yellow onion, diced
- 1 green bell pepper, diced
- 1 red bell pepper, diced
- 2 cups fresh spinach, chopped (or 16 ounces frozen, thawed and drained)
Seasonings and Oils
- Olive oil for pan
- 1/2 tsp garlic powder
- 1 tsp salt-free Mrs. Dash Onion & Herb Seasoning + extra for sprinkling on casserole
- Salt and pepper, to taste
- Hot sauce (optional, to taste)
Instructions
- Preheat the oven: Preheat your oven to 350 degrees Fahrenheit to prepare for baking the casserole.
- Prepare the vegetables: Dice the green and red bell peppers and the onion. Chop the spinach if using fresh. Set all the vegetables aside.
- Whisk the eggs: Crack 12 large eggs into a medium bowl and whisk thoroughly until fully combined. Add a few drops of hot sauce if desired, and whisk again to incorporate.
- Cook the sausage: Heat a large skillet over medium-high heat and add a small amount of olive oil to coat the pan. Add the sausage and cook until fully browned and cooked through. Drain any excess grease and set the sausage aside.
- Sauté the vegetables: Using the same skillet, cook the diced peppers and onions over medium heat for about 2 minutes until slightly softened. Add the chopped spinach and cook for an additional minute. Remove the skillet from the heat.
- Combine sausage and veggies: Return the cooked sausage to the skillet with the vegetables. Add garlic powder, 1 teaspoon of Mrs. Dash Onion & Herb Seasoning, salt, and pepper. Stir everything together until well mixed.
- Transfer to baking dish: Pour the sausage and vegetable mixture into a 9×13 inch glass baking dish that has been lightly sprayed with non-stick olive oil.
- Add the egg mixture: Pour the whisked eggs evenly over the sausage and vegetable layer. Sprinkle additional Mrs. Dash Onion & Herb Seasoning on top to add flavor.
- Bake the casserole: Place the dish in the preheated oven and bake for 25-30 minutes, or until a knife inserted into the center comes out clean and the eggs are fully set.
- Cool and serve: Allow the casserole to cool for 5-10 minutes before slicing. Optionally, top each serving with salsa or your preferred condiments and enjoy your flavorful Whole30 breakfast casserole.
Notes
- You can substitute the sausage with turkey sausage if you are not following Whole30 strictly.
- Fresh spinach adds texture, but frozen spinach works fine if thawed and drained well.
- Feel free to adjust the seasoning levels to your taste, especially with salt and hot sauce.
- This casserole can be made ahead and refrigerated to reheat for quick breakfasts throughout the week.
- Use a non-stick spray that is Whole30 compliant to avoid sticking and ease cleanup.
- Prep Time: 10 minutes
- Cook Time: 30 minutes
- Category: Breakfast Casserole
- Method: Baking
- Cuisine: American
Keywords: Whole30 breakfast, breakfast casserole, sausage and egg casserole, healthy breakfast, meal prep breakfast, protein-packed breakfast, gluten free breakfast

