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A Lighter, Colorful Brunch Favorite You Can Make Ahead
If you’re looking for a wholesome, vibrant twist on traditional breakfast casseroles, this veggie-packed version is a winner. It’s filled with colorful vegetables, fluffy eggs, and melty cheese—all baked into one delicious and nutritious casserole that’s perfect for vegetarians and veggie-lovers alike.
Loaded with flavor and super easy to customize, this dish is perfect for weekend brunches, holidays, or busy mornings. Best of all, you can prep it the night before for a stress-free start to your day.
Ingredients
- 1 tablespoon olive oil
- 1/2 cup diced onion
- 1 cup chopped bell peppers (mix of red, yellow, and green)
- 1 cup chopped baby spinach
- 1/2 cup diced mushrooms
- 1 cup grape tomatoes, halved
- 8 large eggs
- 3/4 cup milk (dairy or plant-based)
- 1 cup shredded cheddar cheese
- 1/2 teaspoon garlic powder
- 1/2 teaspoon dried oregano or Italian seasoning
- Salt and pepper to taste
- Cooking spray or butter for greasing
Instructions
1. Sauté the veggies
In a skillet over medium heat, warm the olive oil. Add onion, bell peppers, mushrooms, and a pinch of salt. Cook for 5–7 minutes until softened. Stir in spinach and cook for 1 minute until wilted. Set aside to cool slightly.
2. Prepare the egg mixture
In a large bowl, whisk together eggs, milk, garlic powder, oregano, salt, and pepper until smooth.
3. Assemble the casserole
Preheat oven to 350°F (175°C). Lightly grease an 8×8 or 9×9-inch baking dish. Spread the sautéed vegetables and halved grape tomatoes evenly in the dish. Sprinkle cheese on top, then pour the egg mixture evenly over everything.
4. Bake
Bake uncovered for 35–40 minutes or until the eggs are set in the center. A toothpick or knife should come out clean. Let cool for 5–10 minutes before slicing.
Tips & Variations
- Cheese Options: Swap cheddar for feta, pepper jack, or mozzarella.
- Add carbs: Mix in cooked hashbrowns or cubed bread for a more filling bake.
- Extra protein: Add plant-based sausage or tofu crumbles for a vegetarian boost.
- Customize your veggies: Use what you have—zucchini, kale, broccoli, or leeks all work great.
Nutrition Overview
This casserole is lighter than its meaty counterparts, but still super satisfying and packed with nutrients from real, whole foods.
Estimated Nutrition Per Serving (1 of 6 servings):
Varies slightly by cheese and milk used.
- Calories: 210
- Protein: 13g
- Carbohydrates: 8g
- Fat: 14g
- Fiber: 2g
- Vitamin A, C, Iron, Calcium: All boosted from veggie content
Great for anyone following a vegetarian, gluten-free, or low-carb lifestyle.
Make-Ahead, Storage & Freezing
- Make-Ahead: Assemble the entire casserole and refrigerate overnight. Bake fresh in the morning.
- Fridge: Store leftovers in an airtight container for up to 4 days.
- Freezer: Cool completely, slice, and freeze individual portions for up to 2 months. Reheat in the microwave or oven.
How to Scale for a Crowd
- Double it: Use a 9×13-inch dish and double all ingredients. Add 5–10 minutes to the bake time.
- Triple it: Use two 9×13 pans for about 15–18 servings. Perfect for larger brunches or potlucks.
- Hosting Tip: Label variations if serving different diets (e.g., veggie vs. meat).
FAQ
Can I use frozen vegetables?
Yes! Just thaw and drain excess moisture before adding to the dish.
Can I make it dairy-free?
Absolutely. Use plant-based milk and dairy-free shredded cheese.
What if I don’t have fresh tomatoes?
Cherry tomatoes, sun-dried tomatoes, or even a few spoonfuls of salsa can work as substitutes.
Final Thoughts
This easy veggie breakfast casserole is a colorful, healthy way to start your day—and a guaranteed crowd-pleaser, even for meat lovers. With endless ways to customize it, you’ll want this recipe on repeat all season long.
Save this one for your next brunch and enjoy a fresh, veggie-forward start to your morning!
Looking for more easy make-ahead breakfast ideas to feed your family or wow your brunch guests? This breakfast casserole recipe is just one of 12 crowd-pleasing make-ahead breakfast casseroles featured in our full roundup.
From cheesy sausage bakes to sweet French toast casseroles, each recipe is designed to be prepped ahead and baked fresh in the morning—perfect for holidays, weekends, or meal prep.
Browse all 12 make-ahead breakfast casseroles here:
https://divahomeinspiration.com/12-make-ahead-breakfast-casseroles-to-feed-a-crowd/
