Overnight Sausage and Caramelized Onion Breakfast Casserole

There’s nothing quite like waking up to the aroma of a delicious breakfast wafting through the house. The Overnight Sausage and Caramelized Onion Breakfast Casserole is a dish that transforms breakfast into a comforting experience. I remember the first time I made it for a cozy Sunday brunch; it was a chilly winter morning, and I had friends coming over. I prepped everything the night before, allowing the flavors to meld together while I slept. When the casserole emerged from the oven, golden and bubbly, everyone gathered around the table, eagerly awaiting a slice. It was a hit, and it quickly became a staple for our weekend gatherings.

Overnight Sausage and Caramelized Onion Breakfast Casserole Ingredients

When it comes to the Overnight Sausage and Caramelized Onion Breakfast Casserole, each ingredient plays a vital role in creating a flavorful and satisfying dish. The combination of savory sausage, sweet caramelized onions, and rich cheeses come together beautifully, resulting in a comforting casserole that’s perfect for any occasion. Here’s what you’ll need:

• 1 pound breakfast sausage: This provides the hearty, savory flavor that anchors the dish.
• 1 tablespoon vegetable oil: Used for sautéing, it helps in cooking the onions to perfection.
• 1 tablespoon butter: Adds richness and depth to the flavors.
• 1 medium yellow or sweet onion, thinly sliced: Essential for that sweet caramelized flavor.
• 1/2 red bell pepper, diced: Adds color and a slight sweetness to balance the dish.
• 6 cups day-old challah bread cubes: The foundation of this casserole, providing a fluffy texture.
• 6 large eggs: Binds everything together and adds protein.
• 1 1/4 cups half-and-half: Brings creaminess and richness to the casserole.
• 3/4 teaspoon salt: Essential for seasoning.
• 1/2 teaspoon dry mustard: Adds a subtle tanginess.
• 1/2 teaspoon dried thyme: Infuses a warm, herbal flavor.
• 1/8 teaspoon ground nutmeg: Adds warmth and depth.
• 1 cup shredded cheddar cheese: Provides rich, melty goodness.
• 1 cup shredded mozzarella cheese: Offers a stretchy, gooey texture.

Directions for Overnight Sausage and Caramelized Onion Breakfast Casserole

Making the Overnight Sausage and Caramelized Onion Breakfast Casserole is a straightforward process. Follow these steps for a delicious outcome.

1. Start by cooking and crumbling the breakfast sausage in a large nonstick skillet over medium heat. This will take about 8 to 10 minutes. You want the sausage to develop a nice brown color while cooking. Once done, use a slotted spoon to remove the sausage from the skillet, leaving the drippings behind.
2. Add vegetable oil and butter to the skillet with the drippings. Allow it to heat up before adding the onions. Cook the onions over medium heat for about 8 minutes, stirring occasionally, until they are soft and caramelized. This process is crucial because it develops the sweet flavor that complements the sausage.
3. Next, add the diced red bell pepper to the onions and cook for another 5 minutes. Season the mixture with salt and pepper to taste. Once everything is well combined, transfer the mixture to the bowl with the sausage.
4. In the meantime, preheat your oven to 350 degrees Fahrenheit. Grease a 7×11-inch baking dish to prevent sticking. Place the challah bread cubes in the bottom of the dish, spreading them evenly.
5. Now, scatter the sausage and onion mixture on top of the bread cubes. This layering ensures that every bite has that delicious flavor combination.
6. In a medium bowl, whisk together the eggs, half-and-half, salt, dry mustard, thyme, and nutmeg. This egg mixture is what binds everything together and gives the casserole its rich texture.
7. Sprinkle half of the cheddar and mozzarella cheeses over the sausage mixture in the baking dish. This will create a delicious cheesy layer that melts beautifully.
8. Pour the egg mixture evenly over the casserole, ensuring all the bread is soaked and the ingredients are distributed.
9. Finally, sprinkle the remaining cheese on top. This will create a bubbly, golden crust as it bakes.
10. Bake the casserole uncovered in the preheated oven for 40 minutes or until it is golden brown and set in the middle. You’ll know it’s done when a knife inserted comes out clean.

Tips and Variations

There are countless ways to customize your Overnight Sausage and Caramelized Onion Breakfast Casserole. Here are some tips to enhance your experience:

• Storage: Store leftovers in an airtight container in the refrigerator for up to three days.
• Freezing: You can freeze the unbaked casserole for up to three months. Just thaw in the fridge overnight before baking.
• Pairing: Serve with fresh fruit or a light salad for a balanced meal.
• Variations: Try adding spinach or mushrooms for a different flavor profile.
• Cheese Swap: Experiment with different cheeses such as pepper jack for a spicy kick.
• Make it Vegetarian: Substitute the sausage with a plant-based option for a vegetarian version.
• Serving Size: This casserole can easily be halved if you’re cooking for fewer people.

What to Serve With Overnight Sausage and Caramelized Onion Breakfast Casserole

Finding the perfect accompaniments to the Overnight Sausage and Caramelized Onion Breakfast Casserole can elevate your meal. Here are some ideas:

• Fresh Fruits: Serve with sliced strawberries, cantaloupe, or a fruit salad for a refreshing contrast.
• Yogurt Parfaits: Layer yogurt with granola and berries for a light and nutritious side.
• Salads: A simple arugula or spinach salad dressed with lemon vinaigrette complements the dish nicely.
• Juices: Pair it with orange juice or a mimosa for a festive brunch feel.
• Herbal Tea or Coffee: A warm beverage can tie the meal together, providing warmth and comfort.
• Occasions: This casserole is perfect for brunch gatherings, family breakfasts, or holiday celebrations.
• Warm Bread: Serve with a side of warm, crusty bread for those who enjoy a hearty meal.

FAQ

Conclusion

The Overnight Sausage and Caramelized Onion Breakfast Casserole is a warm and comforting dish that brings everyone together. It’s perfect for busy mornings or leisurely brunches with family and friends. I encourage you to try this recipe and enjoy the delicious flavors and aromas it brings to your home. You won’t be disappointed with the delightful combination of savory sausage, caramelized onions, and gooey cheese!

Overnight Sausage and Caramelized Onion Breakfast Casserole

The ultimate comfort food, the Overnight Sausage and Caramelized Onion Breakfast Casserole is a cheesy, savory delight that’s perfect for gatherings. With layers of fluffy bread, rich sausage, and sweet caramelized onions, this dish will have everyone coming back for seconds. Make it tonight for an easy, satisfying breakfast that your family will love!

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Prep Time 25 minutes mins

Cook Time 40 minutes mins

Total Time 1 hour hr 5 minutes mins

Servings: 8 servings

Course: Breakfast

Cuisine: American

Calories: 400

Ingredients Equipment Method Notes

Ingredients

  

• 1 pound breakfast sausage
• 1 tablespoon vegetable oil
• 1 tablespoon butter
• 1 medium yellow or sweet onion thinly sliced
• 1/2 each red bell pepper diced
• 6 cups day old challah bread cubes
• 6 large eggs
• 1 1/4 cups half-and-half
• 3/4 teaspoon salt
• 1/2 teaspoon dry mustard
• 1/2 teaspoon dried thyme
• 1/8 teaspoon ground nutmeg
• 1 cup shredded cheddar cheese
• 1 cup shredded mozzarella cheese

Equipment

• Oven
• Baking Sheet
• Skillet
• Cutting Board
• Whisk
• Chef's Knife
• Mixing Bowl

Method

 

1. Start by cooking and crumbling the breakfast sausage in a large nonstick skillet over medium heat. This will take about 8 to 10 minutes. You want the sausage to develop a nice brown color while cooking. Once done, use a slotted spoon to remove the sausage from the skillet, leaving the drippings behind.
2. Add vegetable oil and butter to the skillet with the drippings. Allow it to heat up before adding the onions. Cook the onions over medium heat for about 8 minutes, stirring occasionally, until they are soft and caramelized. This process is crucial because it develops the sweet flavor that complements the sausage.
3. Next, add the diced red bell pepper to the onions and cook for another 5 minutes. Season the mixture with salt and pepper to taste. Once everything is well combined, transfer the mixture to the bowl with the sausage.
4. In the meantime, preheat your oven to 350 degrees Fahrenheit. Grease a 7x11-inch baking dish to prevent sticking. Place the challah bread cubes in the bottom of the dish, spreading them evenly.
5. Now, scatter the sausage and onion mixture on top of the bread cubes. This layering ensures that every bite has that delicious flavor combination.
6. In a medium bowl, whisk together the eggs, half-and-half, salt, dry mustard, thyme, and nutmeg. This egg mixture is what binds everything together and gives the casserole its rich texture.
7. Sprinkle half of the cheddar and mozzarella cheeses over the sausage mixture in the baking dish. This will create a delicious cheesy layer that melts beautifully.
8. Pour the egg mixture evenly over the casserole, ensuring all the bread is soaked and the ingredients are distributed.
9. Finally, sprinkle the remaining cheese on top. This will create a bubbly, golden crust as it bakes.
10. Bake the casserole uncovered in the preheated oven for 40 minutes or until it is golden brown and set in the middle. You’ll know it’s done when a knife inserted comes out clean.

Notes

There are countless ways to customize your Overnight Sausage and Caramelized Onion Breakfast Casserole. Here are some tips to enhance your experience:

• Storage: Store leftovers in an airtight container in the refrigerator for up to three days.
• Freezing: You can freeze the unbaked casserole for up to three months. Just thaw in the fridge overnight before baking.
• Pairing: Serve with fresh fruit or a light salad for a balanced meal.
• Variations: Try adding spinach or mushrooms for a different flavor profile.
• Cheese Swap: Experiment with different cheeses such as pepper jack for a spicy kick.
• Make it Vegetarian: Substitute the sausage with a plant-based option for a vegetarian version.
• Serving Size: This casserole can easily be halved if you're cooking for fewer people.

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Meet Isla Banks

We eat with our eyes first, so I strive to make every dish look as bountiful as it tastes. I work on every stage of the process, from sourcing the freshest ingredients to styling the final shot. I tested this recipe repeatedly to provide you with the visual inspiration and reliability you need to cook with confidence.