Vegetable Frittata Oven-Baked

My tiny apartment kitchen smelled like summer vegetables and hope the first time I attempted a frittata. I had just moved into my first place, barely owned any furniture, but somehow possessed a gorgeous cast iron skillet from my grandmother. That pan saw me through countless experiments, but this vegetable-packed creation became the one I made whenever friends came over for brunch, which was often because my couch was also my bed.

Last spring, my sister came over nursing a terrible heartbreak, and I made this frittata while she sat on my counter telling me things I cannot repeat. We ate it standing up, burning our fingers on the hot pan because neither of us wanted to wait the recommended five minutes. The vegetables were slightly overcooked and the cheese had browned more than intended, but she said it was the first thing she had tasted in weeks that actually tasted like something good would happen eventually.

Ingredients

• 6 large eggs: Room temperature eggs will incorporate more air when whisked, creating a lighter texture that still feels substantial
• 1/4 cup whole milk or dairy-free alternative: This small amount makes all the difference between dry and creamy, though I have used heavy cream in desperate times
• 1 cup shredded cheddar cheese: Feta or goat cheese work beautifully here and add that tangy brightness that cuts through rich eggs
• 1 cup broccoli florets: Chop them quite small so they cook through and become tender rather than crunchy bits that interrupt every bite
• 1 red bell pepper: The sweetness here balances any bitterness from greens and adds those gorgeous jewel-toned flecks throughout
• 1 small zucchini: Slice it thin and sauté it well because zucchini releases water and nobody wants a soggy frittata situation
• 1/2 cup cherry tomatoes: They burst during baking and create little pockets of bright acidity throughout
• 1 small red onion: Thinly sliced, these become sweet and mellow, providing a subtle backbone that ties everything together
• 2 tbsp fresh parsley: Fresh herbs at the end make it taste like you put in way more effort than you actually did
• 1/2 tsp salt and 1/4 tsp black pepper: Eggs need aggressive seasoning to taste good, so do not be shy here
• 1/4 tsp dried oregano: This echoes the Italian spirit of the dish without overwhelming the fresh vegetable flavors
• 2 tbsp olive oil: Use something you actually like the taste of because it is going to coat all your vegetables

Instructions

Preheat your oven and prep your vegetables:

Set your oven to 375°F and chop everything before you turn on any heat because once cooking starts, it moves fast and there is no time to hunt down your cutting board

Sauté your harder vegetables first:

Heat that olive oil in a 10-inch oven-safe skillet over medium heat and add the broccoli, bell pepper, zucchini, and onion, letting them soften for about 4 or 5 minutes

Add the delicate tomatoes:

Toss in the cherry tomatoes for just one minute so they start to break down but do not completely disappear into the vegetables

Whisk your eggs and seasonings:

In a separate bowl, combine the eggs, milk, salt, pepper, oregano, and parsley until the mixture is uniform and slightly frothy

Combine everything in the skillet:

Pour the egg mixture over your sautéed vegetables and scatter the cheese across the top like you are tucking them in for a nap

Start cooking on the stovetop:

Let it cook on the burner for 2 or 3 minutes until you see the edges beginning to set and pull away from the pan slightly

Finish in the oven:

Transfer the whole skillet to the oven and bake for 15 to 18 minutes until the center is no longer jiggly and the top has developed those gorgeous golden patches

Let it rest before slicing:

Wait the full 5 minutes even if the smell is making you insane because this helps the frittata set and makes serving actually possible

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This recipe has traveled with me through three apartments and countless Sunday mornings. There was that one winter afternoon when I made it for myself after a particularly terrible week at work, eating slice after slice while standing at the counter in my pajamas, watching snow accumulate outside my kitchen window. Sometimes the most ordinary food becomes exactly what you need when you least expect to need anything at all.

Making It Your Own

The beauty of a frittata is that it is essentially a clean-out-the-fridge operation disguised as a proper meal. I have made this with spinach and mushrooms in spring, roasted peppers and onions in late summer, and even leftover roasted vegetables from the night before. The only rule is that you cook any watery vegetables thoroughly before adding the eggs, or you will end up with a disappointing texture situation.

Serving Suggestions

A frittata wants to be served with something crisp and fresh to cut through the richness. I usually put together a simple green salad with an aggressive vinaigrette, or maybe some roasted potatoes if I am feeling ambitious. The truth is, it is completely perfect on its own with just a cup of coffee and good conversation.

Storage and Reheating

This keeps beautifully in the refrigerator for up to four days, though it rarely lasts that long in my house. Reheat individual slices in the microwave for about 30 seconds, or eat it cold straight from the container like I do when nobody is watching. The texture actually improves after a night in the fridge as the flavors have time to become properly acquainted.

• Cut slices before refrigerating so you can grab exactly what you want without having to re-cut cold frittata
• Wrap slices individually in parchment or wax paper for an incredibly convenient breakfast grab-and-go situation
• Never freeze frittata because the texture will become rubbery and sad, which is honestly just a waste of good eggs

Save

Save

There is something deeply comforting about a dish that welcomes whatever you have on hand and turns it into something worth gathering around. This frittata has fed tired friends, celebrating families, and many versions of myself at different kitchen tables, always delivering exactly what was needed.

Recipe FAQs

→ What vegetables work best in this dish?

Broccoli, bell pepper, zucchini, cherry tomatoes, and red onion work beautifully. You can also swap in seasonal vegetables like spinach, mushrooms, or asparagus based on what's available.

→ Can I make this dairy-free?

Yes! Use plant-based milk instead of whole milk and either omit the cheese or use a vegan cheese alternative. The dish will still be delicious and satisfying.

→ How long does it keep in the refrigerator?

Store cooled slices in an airtight container for up to 3-4 days. It reheats beautifully in the microwave or can be enjoyed cold or at room temperature.

→ What should I serve with this?

A crisp green salad or crusty bread make excellent sides. For wine lovers, a light Sauvignon Blanc pairs wonderfully with the vegetables and cheese.

→ Can I freeze this dish?

Yes, you can freeze cooled slices wrapped individually for up to 2 months. Thaw overnight in the refrigerator and reheat gently before serving.

→ What size skillet should I use?

A 10-inch oven-safe skillet works perfectly. This size allows the vegetables and egg mixture to cook evenly and creates the ideal thickness for serving.