Picture a vibrant morning when a hearty, veggie-packed breakfast is the perfect way to kick things off, with eggs and colorful peppers ready to shine in the kitchen.

This Egg and Veggie Bake delivers—fluffy, protein-rich, and loaded with savory mushrooms and tomatoes, it’s a breakfast that fuels the day with flavor.

This recipe is so simple it nails a golden, satisfying bake every time. Ready to whip up a morning dish that’s as nutritious as it is tasty? Let’s get cooking!

Egg and Veggie Casserole Recipe

For this delicious breakfast recipe, you’ll need the following ingredients:

Ingredients

Ingredient	Amount
Large Eggs	12
Button Mushrooms, sliced	1 cup
Onion, diced	1 medium
Red Bell Pepper, diced	1
Green Bell Pepper, diced	1
Cherry Tomatoes, quartered	1 cup
Mozzarella Cheese, shredded	⅔ cup
Milk (2%)	4 tbsp
Olive Oil	1 tbsp
Salt	1 ⅓ tsp
Black Pepper	½ tsp

Optional Add-Ons

• 1/4 cup chopped spinach – Mixes in extra green nutrition.
• 1 tsp fresh basil – Adds a herby, aromatic note.
• 1/4 tsp smoked paprika – Brings a smoky, warm depth.

Tools You’ll Need

• 9×13-inch baking dish – Bakes the casserole evenly.
• Nonstick skillet – Sautés veggies to perfection.
• Medium mixing bowl – Whisks eggs and milk smoothly.
• Whisk – Blends egg mixture without lumps.
• Spatula – Spreads and transfers ingredients neatly.

Step-by-Step Instructions

Step 1: Preheat Oven

Set the oven to 375°F (190°C) to warm up—takes about 10 minutes. Spray a 9×13-inch baking dish with cooking spray to prevent sticking.

Step 2: Prep Veggies

Dice 1 medium onion, 1 red bell pepper, 1 green bell pepper, and quarter 1 cup cherry tomatoes—slice 1 cup button mushrooms thinly. Keep veggies ready.

Step 3: Sauté Veggies

Heat 1 tbsp olive oil in a nonstick skillet over medium heat—add onions and cook 2-3 minutes until soft. Add mushrooms and bell peppers, cooking 4-5 minutes until tender.

Step 4: Season and Cool

Season veggies with a pinch of salt and pepper—cook 1 minute more, then remove from heat. Let cool for 5 minutes to avoid curdling eggs.

Step 5: Whisk Egg Mixture

In a medium mixing bowl, whisk 12 large eggs, 4 tbsp 2% milk, 1 1/3 tsp salt, and 1/2 tsp black pepper until fully combined—should be smooth and frothy.

Step 6: Combine with Veggies

Spread cooled veggies evenly in the baking dish—add cherry tomatoes on top. Pour the egg mixture over, ensuring veggies are covered evenly.

Step 7: Top with Cheese

Sprinkle 2/3 cup shredded mozzarella evenly over the egg mixture—add a bit more if you’re a cheese lover. Ready for the oven.

Step 8: Bake and Serve

Bake for 30-35 minutes until edges are set and the center is golden with a slight jiggle—test with a knife for a clean pull. Cool 5-10 minutes, then slice and serve.

Storage and Serving

Store in an airtight container in the fridge for up to 4 days—reheat at 325°F for 10 minutes or enjoy cold. Serve as a breakfast main or brunch centerpiece with fruit.

Substitutes and Variations

• Cheese Swap – Use cheddar or feta instead of mozzarella.
• Veggie Mix – Swap mushrooms for zucchini or add broccoli.

Nutritional Breakdown

Nutrient	Per Serving (8 servings total)
Calories	160 kcal
Fat	10g
Protein	12g
Total Carbs	5g
Fiber	1g
Net Carbs	4g

Note: Values are approximate and vary by brands.

Pairing Suggestions

• Serve with a mixed berry bowl for a sweet contrast.
• Pair with a latte for a cozy morning vibe.
• Add a side of avocado for creamy richness.
• Enjoy with sparkling water for a refreshing lift.

Common Mistakes to Avoid

Early batches hit snags, so here’s how to steer clear with extra clarity:

1. Using hot veggies and curdling the eggs – Adding sautéed veggies without cooling starts cooking the eggs prematurely, creating lumps; a curdled batch was a mess—let veggies cool for 5 minutes first.
2. Overbaking and getting a rubbery texture – Baking past 35 minutes dries out the eggs, making them tough; a chewy slice was disappointing—check at 30 minutes for a slight jiggle.
3. Skipping veggie sauté and ending with watery casserole – Raw mushrooms and peppers release water during baking, diluting the dish; a soggy result taught a lesson—sauté to remove moisture.
4. Underwhisking eggs and getting an uneven bake – Poorly mixed eggs lead to patchy texture with dense spots; an uneven slice was a bummer—whisk until frothy and smooth.

FAQs

Can I use whole milk?

Yes, it’s creamier—same amount works fine.

No mozzarella?

Use shredded cheddar or parmesan—same quantity.

Frozen veggies okay?

Yes, thaw and pat dry to avoid excess water.

Conclusion

When a high-protein breakfast is the vibe, this Egg and Veggie Bake bursts onto the scene with fluffy eggs, cheesy goodness, and vibrant veggies to power up any morning. Toss it together for your next sunrise spread, and pop back with a comment to share how it went—bet it’ll be a hit!