Overnight Breakfast Casserole with Sausage, Cheddar, and Veggies Recipe

If you’re looking for a comforting, hearty breakfast that practically makes itself while you sleep, then the Overnight Breakfast Casserole with Sausage, Cheddar, and Veggies Recipe is your new best friend. This dish brings together the savory richness of browned sausage, the creamy tang of cheddar cheese, and the fresh crunch of bell peppers and onions, all soaked into tender bread cubes and baked to golden perfection. It’s a simple yet show-stopping breakfast that’s perfect for lazy weekends, busy mornings, or feeding a crowd without stress.

Ingredients You’ll Need

Gathering the right ingredients for this casserole is easier than you might think. Each component plays a key role: from the flavorful sausage to the creamy cheese and fresh veggies, all combining to deliver layers of delicious texture and taste.

• 1 lb breakfast sausage: Crumbled and browned, it adds a hearty, savory base to the casserole.
• 8 slices of bread, cubed: Acts as the sponge to soak up all the rich egg and milk mixture.
• 2 cups shredded cheddar cheese: Melts beautifully for a creamy, cheesy topping and pockets of bliss throughout.
• 8 large eggs: The binding agent that brings it all together with a custard-like texture.
• 2 cups milk: Adds moisture and creaminess, making every bite tender and soft.
• 1 teaspoon Dijon mustard: Enhances the depth of flavor with a subtle kick.
• 1 teaspoon salt: Balances and enhances all the flavors.
• ½ teaspoon black pepper: Adds just the right amount of spice to keep things interesting.
• ½ teaspoon paprika: Lends a soft smoky warmth and vibrant color.
• 1 cup diced bell peppers (optional): Gives a fresh crunch and a pop of color.
• 1 cup diced onions (optional): Adds sweetness and a subtle bite that complements the sausage wonderfully.
• Fresh herbs for garnish (optional): Brings brightness and a fresh finish when sprinkled on top.

How to Make Overnight Breakfast Casserole with Sausage, Cheddar, and Veggies Recipe

Step 1: Cook the Sausage

Begin by heating a large skillet over medium heat and cooking the crumbled breakfast sausage until it’s nicely browned and fully cooked through. Breaking it up as it cooks ensures every bite has that perfect sausage texture. Once browned, drain any excess grease and set the sausage aside to cool slightly. This step infuses the casserole with that rich, meaty flavor that’s impossible to resist.

Step 2: Prepare the Baking Dish

Next, lightly grease a 9×13 inch baking dish or spritz it with non-stick cooking spray. This simple step will make sure your casserole lifts out easily once it’s baked, helping you serve gorgeous slices without a hitch.

Step 3: Layer the Bread and Sausage

Evenly spread the cubed bread across the bottom of your prepared dish. If you’re including the sausage, sprinkle the cooked meat over the bread layer evenly. This layering lets the flavors mingle beautifully when the egg mixture is added.

Step 4: Whisk the Egg Mixture

In a large bowl, whisk together the eggs, milk, Dijon mustard, salt, black pepper, and paprika until everything is fully combined. This creates a flavorful custard that will soak the bread and hold the entire casserole together with luscious, creamy goodness.

Step 5: Combine Ingredients in the Dish

Pour the egg mixture evenly over the bread and sausage. Gently press down on the bread cubes using the back of a spoon to help them absorb the liquid thoroughly. This step is crucial for a tender, custardy texture inside your casserole.

Step 6: Add Cheese and Veggies

Sprinkle the shredded cheddar cheese all over the top. If you love a bit of veggie goodness, scatter the diced bell peppers and onions on top of the cheese. These veggies add a delicious sweet crunch and brighten up the dish visually.

Step 7: Refrigerate Overnight

Cover your casserole tightly with plastic wrap and refrigerate overnight. This gives the bread time to soak up the egg mixture and all those amazing flavors, setting the stage for a perfect bake in the morning.

Step 8: Bake to Perfection

The next morning, preheat your oven to 350°F (175°C). Remove the plastic wrap and bake the casserole for 45 to 55 minutes until the center is set and the top is a lovely golden brown. You can test for doneness by poking the center with a toothpick—it should come out clean, signaling that it’s ready.

Step 9: Cool and Serve

After baking, let your casserole cool for about 10 minutes before slicing. This brief rest allows it to set up nicely so you get clean, beautiful pieces every time. Optionally garnish with fresh herbs before serving to add a burst of color and freshness.

How to Serve Overnight Breakfast Casserole with Sausage, Cheddar, and Veggies Recipe

Garnishes

Fresh herbs like parsley, chives, or cilantro are wonderful garnishes for this casserole. They add a pop of color and bring a fresh, herbal note that cuts through the richness. A dollop of sour cream or a drizzle of hot sauce can also elevate the flavors wonderfully.

Side Dishes

Since this casserole is packed with protein and veggies, simple sides work best. A fresh fruit salad or sliced avocado offers a refreshing contrast, while a crisp green salad keeps your meal light but satisfying. For brunch gatherings, consider serving alongside crispy bacon or toasted English muffins.

Creative Ways to Present

Looking to jazz it up? Serve individual portions in small ramekins for a classy touch or layer the casserole in a clear glass dish to show off the beautiful layers of bread, cheese, sausage, and veggies. Adding a sprinkle of extra cheese or paprika right before serving gives it an inviting, rustic look.

Make Ahead and Storage

Storing Leftovers

One of the best things about this recipe is how well it stores. Simply cover leftover casserole tightly with foil or transfer to an airtight container and keep it in the fridge for up to 4 days. Each reheated piece will still be deliciously rich and satisfying.

Freezing

This casserole freezes beautifully for longer storage. Wrap it tightly in plastic wrap and then in foil, or transfer portions to freezer-safe containers. Freeze for up to 3 months. When you’re ready for a quick meal, thaw overnight in the fridge before reheating.

Reheating

Reheat refrigerated or thawed casserole portions in a preheated oven at 350°F (175°C) for about 15 to 20 minutes, or until warmed through. You can also microwave individual slices for around 1-2 minutes, though the oven will help maintain that crispy top.

FAQs

Can I make this casserole vegetarian?

Absolutely! Simply omit the sausage and add extra veggies like mushrooms, zucchini, or spinach for a delicious meat-free version. You can also boost protein with beans or tofu if you like.

What kind of bread works best?

Sturdy, slightly stale bread holds up best for this casserole. Think French bread, sourdough, or plain sandwich bread. Fresh bread can sometimes become too mushy after soaking overnight.

Can I use different cheeses?

Definitely! While cheddar is classic, feel free to experiment with Monterey Jack, mozzarella, or even pepper jack for a bit of heat. Combining cheeses can add even more flavor complexity.

How long can I refrigerate before baking?

It’s best to bake within 24 hours of assembling. The overnight soak is key to the texture, but going beyond that can make the casserole too soggy.

Can I prepare this casserole if I’m gluten-free?

Yes, just substitute the bread with your favorite gluten-free bread. Just be aware that the texture might vary slightly depending on the bread used.

Final Thoughts

If you want a breakfast that feels like a warm hug from the inside out, the Overnight Breakfast Casserole with Sausage, Cheddar, and Veggies Recipe will quickly become your go-to. It’s effortless to prepare, bursting with flavor, and perfect for starting the day on the right note. Trust me, once you try it, preparing breakfast the night before will feel like the smartest, tastiest thing you ever did.

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