Caramelized Onion Frittata: the Recipe for an Easy and Delicious Dinner!

Onion Frittata is a classic recipe of poor Italian cuisine: simple and incredibly versatile, it is perfect to enjoy both hot and cold as a vegetarian main course or, cut into pieces, as an appetizer or aperitif, but also to use to fill sandwiches and rolls to take with you on picnics and trips out of town. Soft and tasty, it is the ideal dinner saver for when you don't feel like cooking, and it is simple even for those who are new to the kitchen because it can be made in a few minutes with very few ingredients.

What is Onion Frittata?

Onion frittata is a classic Italian dish that combines the simplicity of eggs with the rich flavor of sautéed onions, resulting in a savory, satisfying meal. The frittata, similar to an omelette but cooked more slowly and often finished in the oven, has been a staple of Italian cuisine for centuries, praised for its versatility and ease of preparation. Traditionally, frittatas were a practical way to use up leftovers, incorporating various vegetables, meats, and cheeses. The onion frittata, in particular, highlights the natural sweetness and depth of flavor of onions, making it a popular choice for both humble home kitchens and festive occasions. This dish exemplifies the Italian culinary philosophy of using simple, high-quality ingredients to create delicious, hearty meals that can be enjoyed at any time of day, whether hot, at room temperature, or cold.

Tips for The Best Onion Frittata

• Decide between red and white onions based on your flavor preference. Red onions add a sweeter taste, while white onions provide a stronger, sharper flavor.
• Cook the onions slowly over medium heat until they are soft and golden brown, which usually takes about 10 minutes. This caramelization process enhances their sweetness and flavor.
• Season the beaten eggs with salt, pepper, and a touch of rosemary for added aroma. You can substitute rosemary with other herbs or spices you prefer, like thyme or parsley.
• When cooking the frittata, ensure the edges are set before flipping. Use a large plate to cover the pan, turn the pan upside down to transfer the frittata to the plate, then gently slide it back into the pan to cook the other side.
• Feel free to add other ingredients like sautéed vegetables, cheese, or cooked meats to customize your frittata to your liking.

Frittata Vs. Omelette Vs. Quiche

A frittata is an Italian dish made by cooking beaten eggs mixed with various ingredients on the stovetop and often finished in the oven. A quiche, of French origin, features a savory custard made with eggs and cream baked in a pastry crust, typically with fillings like cheese, vegetables, or meat. An omelette, also French, is a quickly cooked egg dish made by folding beaten eggs around fillings like cheese, herbs, or vegetables, cooked solely on the stovetop and served immediately.

What Types of Onions are Best for Onion Frittata?

The beauty of this recipe is that it can be made with all varieties of onion: we preferred white onions, with a strong and decisive flavor, but you can also opt for red onions, which will give your omelette a sweeter and more delicate flavor.

How To Not Cry When Cutting Onions?

To avoid tears while slicing the onions, remember to put them in the freezer for at least 30 minutes before starting: the cold will slow down the release of the irritating enzymes that make our eyes burn when we peel and cut the onion.

How Do I Turn The Frittata When Cooking?

To turn the omelette without breaking it by place a plate on top of the pan, but if you are not very handy here is a little trick to cook the omelette without turning it: cook it on medium heat for 5 minutes, or until it has solidified; at this point continue cooking on low heat, with the lid on, for about a quarter of an hour.

Can I Make This in The Oven, Instead?

Of course! For those who prefer a lighter version, don’t worry, we got you covered! You can bake your frittata in the oven at 375°F (190°C) for about 25 minutes, or until set.

Can I Make This Frittata Ahead of Time?

Absolutely! Precisely because it is also excellent cold, you can cook it in advance and enjoy it whenever you prefer; the next day it is even better.

What Can I Serve With Onion Frittata?

Serve it with a fresh, crisp salad dressed with a light vinaigrette to complement the richness of the frittata. Roasted or sautéed vegetables, such as asparagus, bell peppers, or zucchini, add color and additional flavors. A slice of crusty bread or a warm baguette is perfect for soaking up any juices. For a heartier option, consider serving the frittata alongside roasted potatoes or a grain salad, like quinoa or farro, mixed with herbs and lemon.

More Frittata Recipes You Might Love

Vegetable Frittata

Baked Potato Frittata

Frittata Toast

American Frittata

Spinach and Potato Frittata

How to Store Onion Frittata

Onion frittata is excellent if eaten hot at the moment, but you can also consume it at room temperature or cold. However, you can keep it in the refrigerator for 1-2 days, inside an airtight container, perhaps already cut into slices.

How to Make Onion Frittata

Start preparing the onion frittata by thinly slicing the onions.

Heat the extra virgin olive oil in a pan and cook the onions until they are soft and golden: it will take about 10 minutes.

In the meantime, beat the eggs in a bowl, season with salt and pepper and add the grated parmesan. You can also add some rosemary to flavor it further.

Pour the egg mixture into the pan, over the onions.

Cook over low heat, with the lid on, for 5-6 minutes.

As soon as the edges start to set and come away, cover the pan with a large plate.

Turn over to transfer the frittata onto a plate, being careful not to break it.

Finally, gently slide the frittata into the pan to cook on the other side.

Your onion frittata is ready to be served. It is excellent if consumed hot at the moment, but you can also enjoy it at room temperature or cold.