Easy Overnight Italian Breakfast Casserole

Looking for a breakfast dish that’s as delicious as it is easy to prepare? Look no further than this Easy Overnight Italian Breakfast Casserole! Perfect for brunch gatherings or cozy family breakfasts, this dish combines savory ingredients with the heartiness of eggs and cheese. Best of all, you can prepare it the night before, letting the flavors meld beautifully as it rests in the fridge. When morning comes, all you need to do is pop it in the oven, and you’ll have a warm, satisfying meal ready to serve.

Why It Works Every Time

This Easy Overnight Italian Breakfast Casserole is foolproof for several reasons. First, the combination of Italian sausage, fresh vegetables, and aromatic herbs creates a flavor explosion that will awaken your senses. The overnight aspect allows the bread (if you choose to add it) to soak up the egg mixture, resulting in a creamy texture that contrasts beautifully with the crispy edges. Moreover, it’s versatile—feel free to swap in your favorite seasonal veggies or cheeses as you see fit!

What We’re Using

• 1 tablespoon olive oil or cooking spray for greasing the baking dish.
• 1 pound uncooked Italian sausage, casings removed for that rich, meaty flavor.
• 1 teaspoon Italian seasoning to enhance the dish with classic Italian herbs.
• 1 teaspoon fresh rosemary, finely chopped for a fragrant touch.
• 1 small onion, diced for sweetness and depth of flavor.
• 2 red bell peppers, seeds removed and diced for color and crunch.
• 2 cups fresh spinach for a nutritious boost.
• 2 cloves garlic, minced to add a savory aroma.
• 1/2 teaspoon salt to balance the flavors.
• 1/4 teaspoon black pepper for a hint of spice.
• 1 dozen large eggs as the main base of the casserole.
• 1/2 cup full-fat milk for creaminess and richness.
• 1/3 cup ricotta cheese for a creamy, luscious texture.
• 1/3 cup finely grated Parmesan cheese to finish off the dish with a cheesy crust.

Prep & Cook Tools

• 9×13-inch baking dish for assembling and baking the casserole.
• Large skillet for cooking the sausage and vegetables.
• Mixing bowl for whisking the eggs and milk.
• Whisk for blending the egg mixture smoothly.
• Spatula for folding in the veggies and sausage.

Directions: Easy Overnight Italian Breakfast Casserole

Step 1: Prepare the Baking Dish

Start by preheating your oven to 350°F (175°C). Grease the 9×13-inch baking dish with olive oil or cooking spray to prevent sticking.

Step 2: Cook the Sausage

In a large skillet over medium heat, add the Italian sausage. Use a spatula to break it apart as it cooks, allowing it to brown evenly. After about 5 minutes, when the sausage is no longer pink, drain excess fat if necessary.

Step 3: Add Vegetables and Seasonings

Stir in the diced onion, red bell peppers, and minced garlic to the sausage. Cook for an additional 3-4 minutes until the vegetables are tender. Add the spinach, Italian seasoning, fresh rosemary, salt, and black pepper. Cook until the spinach is wilted, then remove from heat.

Step 4: Whisk the Egg Mixture

In a large mixing bowl, whisk together the eggs, milk, ricotta cheese, and half of the Parmesan cheese until smooth.

Step 5: Combine Ingredients

Fold the cooked sausage and vegetable mixture into the egg mixture, ensuring everything is evenly distributed.

Step 6: Assemble the Casserole

Pour the entire mixture into the prepared baking dish, spreading it out evenly. Top with the remaining Parmesan cheese.

Step 7: Refrigerate Overnight

Cover the casserole with plastic wrap or aluminum foil and refrigerate overnight. This allows the flavors to meld and the bread (if added) to absorb the egg mixture.

Step 8: Bake

The next day, remove the casserole from the refrigerator and let it sit at room temperature for about 20 minutes. Then, bake in the preheated oven for 45-50 minutes or until the top is golden brown and the center is set.

Step 9: Serve and Enjoy

Let the casserole cool for a few minutes before slicing. Serve warm garnished with fresh herbs or additional cheese if desired.

In-Season Flavor Ideas

• Add zucchini or mushrooms for a hearty twist.
• Incorporate fresh basil or chives to brighten the flavor.
• Swap out red bell peppers for yellow or green for a different taste.
• Top with avocado slices after baking for extra creaminess.

Common Errors (and Fixes)

• Overcooking the casserole: Keep an eye on the baking time to avoid a dry texture. Check for doneness by inserting a knife into the center—if it comes out clean, it’s ready!
• Egg mixture not setting: If your casserole is too watery, it may need extra baking time. Cover it loosely with foil if the top is browning too quickly.
• Flavors not blending: Ensure you let the casserole sit overnight; this is crucial for the flavors to meld.
• Using low-fat dairy: Stick to full-fat milk and cheeses for the best creamy texture. Low-fat alternatives can result in a rubbery consistency.

Make Ahead Like a Pro

This Easy Overnight Italian Breakfast Casserole is designed for make-ahead convenience. Prepare it the night before, cover, and refrigerate. If you have leftovers, they can be stored in an airtight container in the fridge for up to 3 days. Reheat individual portions in the microwave or warm the entire dish in the oven at 350°F (175°C) until heated through. You can also freeze the casserole before baking it—just ensure it’s well covered. When ready to bake, thaw it in the refrigerator overnight, then bake as directed.

Frequently Asked Questions

Can I use a different type of sausage?

Absolutely! You can substitute with turkey sausage, chicken sausage, or even a vegetarian sausage for a different flavor profile. Just ensure that it’s fully cooked before adding it to the casserole mixture.

Can I add more vegetables?

Yes! Feel free to customize your casserole with any seasonal vegetables you have on hand. Just remember to chop them finely so they cook evenly.

How do I store leftovers?

Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the oven or microwave before enjoying.

Can I make this casserole without cheese?

Yes! If you’re looking to make a cheese-free version, you can omit the ricotta and Parmesan. The casserole will still be delicious and flavorful.

The Takeaway

This Easy Overnight Italian Breakfast Casserole is not only simple to prepare but also a delightful way to kick off your day. With its rich flavors and hearty ingredients, it’s bound to be a hit at any breakfast or brunch table. Remember, it’s all about convenience and flavor, and this casserole hits both marks perfectly. Whether you’re cooking for a crowd or just for your family, you’ll find that this dish is sure to please everyone. Enjoy the ease of preparing it the night before and the joy of serving a delicious homemade breakfast that feels like a warm hug in every bite!