Colorful Oven-Baked Vegetable Frittata

Featured in: Warm Rustic Bake & Roast Recipes

This vibrant Italian-style dish brings together fresh seasonal vegetables including broccoli, bell peppers, zucchini, and cherry tomatoes, all enveloped in a fluffy egg and milk base with melted cheddar cheese. The preparation involves sautéing vegetables until tender, then combining them with whisked eggs and baking until golden and set. The result is a protein-rich, satisfying meal that works beautifully for breakfast, brunch, or a light dinner. The dish is naturally vegetarian and gluten-free, making it adaptable for various dietary needs while delivering rich flavors from herbs like parsley and oregano.

Updated on Wed, 21 Jan 2026 10:56:00 GMT
A freshly baked vegetable frittata in a skillet, topped with melted cheese and vibrant red bell peppers, zucchini, and cherry tomatoes.  Save
A freshly baked vegetable frittata in a skillet, topped with melted cheese and vibrant red bell peppers, zucchini, and cherry tomatoes. | amberspill.com

The smell of vegetables sizzling in olive oil still takes me back to my tiny first apartment kitchen, where I learned that a frittata could rescue any assortment of dying produce from the crisper drawer. I'd toss in whatever was wilting, crack some eggs, and suddenly dinner felt intentional instead of desperate. This vegetable frittata became my go-to for nights when I wanted something comforting but not heavy, and now it's a staple I can make without even thinking.

Last spring I made this for a group of friends who swore they hated zucchini, and watched them go back for seconds without even realizing what they were eating. The vegetables get sweet and tender in the oven, the cheese bubbles into golden patches, and somehow the whole thing feels more special than scrambled eggs have any right to be.

Ingredients

  • 6 large eggs: Room temperature eggs whisk up better and blend more smoothly with the milk
  • 1 cup broccoli florets: Cut them small so they cook through and become tender instead of crunchy
  • 1 red bell pepper: Adds natural sweetness and that gorgeous pop of color against the yellow eggs
  • 1 small zucchini: Slice it thin so it softens properly in the skillet
  • 1/2 cup cherry tomatoes: They burst slightly in the oven and create little pockets of juice
  • 1 small red onion: Thinly sliced so it mellows out and sweetens as it cooks
  • 1 cup shredded cheddar cheese: Feta or goat cheese work beautifully too if you want something tangier
  • 1/4 cup whole milk: Makes the eggs tender and creamy, though any milk works fine
  • 2 tbsp fresh parsley: Brightens everything up, though dried oregano or basil work in a pinch
  • 1/2 tsp salt and 1/4 tsp black pepper: Don't skimp here since eggs need proper seasoning
  • 2 tbsp olive oil: For sautéing the vegetables until they're soft and fragrant

Instructions

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Preheat your oven:
Get it to 375°F so it's ready when you need to slide the skillet in
Sauté the vegetables:
Heat olive oil in a 10-inch oven-safe skillet over medium heat, then cook broccoli, bell pepper, zucchini, and onion for 4 to 5 minutes until they're softened and fragrant
Add the tomatoes:
Toss in the cherry tomatoes and cook for just one more minute so they stay intact
Whisk the eggs:
In a large bowl, beat the eggs with milk, salt, pepper, oregano, and parsley until everything's well combined
Combine everything:
Pour the egg mixture evenly over the vegetables, then sprinkle the cheese across the top
Start on the stove:
Cook for 2 to 3 minutes until you see the edges beginning to set
Finish in the oven:
Transfer the skillet to the oven and bake for 15 to 18 minutes until the center is set and lightly golden
Let it rest:
Wait 5 minutes before slicing, which helps the frittata hold its shape beautifully
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Keeps spices within easy reach while cooking, helping you season dishes quickly during everyday meal prep.
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Slice of golden vegetable frittata served on a white plate, garnished with fresh parsley, alongside a simple green salad.  Save
Slice of golden vegetable frittata served on a white plate, garnished with fresh parsley, alongside a simple green salad. | amberspill.com

My sister asked for this recipe after I served it at Easter brunch, and now she makes it every Sunday for meal prep. There's something deeply satisfying about a dish that looks impressive but comes together in under an hour with minimal effort.

Make It Your Own

The beauty of a frittata is that it adapts to whatever vegetables you have on hand or what's in season. Spinach, mushrooms, asparagus, or even roasted sweet potatoes work beautifully here. Just keep the total vegetable amount roughly the same so the egg-to-vegetable ratio stays balanced.

Serving Suggestions

This frittata is perfect alongside a crisp green salad dressed with vinaigrette, or some crusty bread for soaking up any runny yolk. It also works beautifully for brunch with roasted potatoes and fresh fruit. A light Sauvignon Blanc cuts through the richness nicely if you're serving wine.

Storage and Reheating

The frittata keeps well in the refrigerator for up to 4 days, making it excellent for meal prep or quick weekday breakfasts. Reheat individual slices in the microwave for 30 to 60 seconds, or warm the whole thing gently in a low oven.

  • Wrap slices tightly in plastic wrap or foil for the fridge
  • It's actually delicious cold, straight from the refrigerator
  • Freeze cooked slices for up to 2 months if you want to stash some away
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Colorful Italian vegetable frittata with broccoli and onions, baked to perfection and ready for a vegetarian brunch or dinner. Save
Colorful Italian vegetable frittata with broccoli and onions, baked to perfection and ready for a vegetarian brunch or dinner. | amberspill.com

However you serve it, this frittata turns simple ingredients into something that feels like a small celebration.

Recipe FAQs

What vegetables work best in this dish?

Broccoli, bell peppers, zucchini, cherry tomatoes, and red onions provide excellent flavor and texture. You can easily substitute with spinach, mushrooms, or asparagus based on seasonal availability.

Can I make this dairy-free?

Yes, simply replace whole milk with your favorite plant-based milk alternative and either omit the cheese or use a vegan cheese substitute that melts well.

How do I know when it's done baking?

The edges should be set and slightly golden, while the center feels firm to the touch rather than jiggly. A knife inserted in the middle should come out clean.

What should I serve alongside?

A crisp green salad with light vinaigrette complements the richness beautifully. Crusty bread for soaking up any juices and a glass of Sauvignon Blanc make for a complete meal.

Can I prepare this ahead of time?

This tastes wonderful served at room temperature, making it ideal for meal prep or brunch entertaining. You can bake it up to a day in advance and reheat gently, or serve cold.

What type of skillet is essential?

You need a 10-inch oven-safe skillet that can transfer from stovetop to oven. Cast iron or stainless steel works perfectly for achieving the best texture.

Colorful Oven-Baked Vegetable Frittata

A colorful, oven-baked egg dish packed with seasonal vegetables and creamy cheese. Ready in 40 minutes.

Prep Time
15 minutes
Cook Time
25 minutes
Overall Time
40 minutes


Level Easy

Cuisine Italian

Portions 4 Serving Size

Diet Preferences Vegetarian-Friendly, Gluten-Free

What You Need

Vegetables

01 1 cup broccoli florets, chopped
02 1 red bell pepper, diced
03 1 small zucchini, sliced
04 1/2 cup cherry tomatoes, halved
05 1 small red onion, thinly sliced

Eggs & Dairy

01 6 large eggs
02 1/4 cup whole milk
03 1 cup shredded cheddar cheese

Herbs & Seasoning

01 2 tablespoons fresh parsley, chopped
02 1/2 teaspoon salt
03 1/4 teaspoon black pepper
04 1/4 teaspoon dried oregano

Oil

01 2 tablespoons olive oil

How To Make

Step 01

Preheat Oven: Preheat oven to 375°F.

Step 02

Sauté Vegetables: Heat olive oil in a 10-inch oven-safe skillet over medium heat. Add broccoli, bell pepper, zucchini, and onion. Sauté for 4–5 minutes until softened.

Step 03

Add Tomatoes: Stir in cherry tomatoes and cook for 1 more minute. Remove from heat.

Step 04

Prepare Egg Mixture: In a large bowl, whisk eggs, milk, salt, pepper, oregano, and parsley until well combined.

Step 05

Combine Ingredients: Pour the egg mixture evenly over the sautéed vegetables in the skillet. Sprinkle cheese evenly over the top.

Step 06

Set Edges on Stovetop: Cook on the stovetop for 2–3 minutes until edges begin to set.

Step 07

Bake Until Set: Transfer skillet to the oven and bake for 15–18 minutes, or until the center is set and slightly golden.

Step 08

Rest and Serve: Let cool for 5 minutes before slicing. Serve warm or at room temperature.

Equipment Needed

  • Oven-safe skillet (10-inch)
  • Mixing bowl
  • Whisk
  • Knife and cutting board

Allergy Details

Always check each item in your recipe for allergens. Reach out to a health expert with any concerns.
  • Contains eggs and milk (dairy). Cheese and milk may contain lactose.

Nutrition Per Serving

Nutritional values are for reference and not a substitute for advice from a doctor.
  • Calories: 260
  • Fats: 17 grams
  • Carbohydrates: 8 grams
  • Proteins: 16 grams