clock clock iconcutlery cutlery iconflag flag iconfolder folder iconinstagram instagram iconpinterest pinterest iconfacebook facebook iconprint print iconsquares squares iconheart heart iconheart solid heart solid icon
Onion Frittata with Goat Cheese and Arugula | Naturally Ella

Onion Frittata with Goat Cheese and Arugula

  • Author: Erin Alderson
  • Prep Time: 10 minutes
  • Cook Time: 45 minutes
  • Total Time: 55 minutes
  • Yield: 4 servings 1x


Perfect for a weekend breakfast, this onion frittata uses slow-cooked onions for the base and a light arugula salad for a finish.



Onion Base

1 large yellow onion

1 tablespoon butter

1/8 teaspoon sea salt

1 tablespoon sherry vinegar


6 large eggs

3 tablespoons heavy cream

¼ teaspoon salt

¼ teaspoon black pepper

1 ounce crumbled goat cheese


2 cups arugula

1 tablespoon olive oil

1 teaspoon lemon juice

½ teaspoon lemon zest

¼ teaspoon stone ground mustard

⅛ teaspoon black pepper

⅛ teaspoon salt


  • Peel and cut the onion in half. Cut each half into thin slices, roughly 1/8” thick. Heat a 10” cast iron skillet over medium-low heat. Add the olive oil, followed by the onions. Sprinkle a little salt over the onions, reduce the heat to low, and cook until the onions are soft and starting to brown, 25 to 30 minutes or so (see note). Measure in the vinegar, scrapping up any bits of onion stuck to the pan. When the onions are almost done, preheat the oven to 425˚F.
  • Whisk together the eggs, heavy cream, salt, and pepper; making sure to not overly beat the egg mixture. Pour into the pan and let cook until the sides begin to set. Sprinkle the goat cheese over the egg mixture and transfer the skillet to the oven. Continue to cook for 10 to 12 minutes until the frittata is puffed and starting to brown on top.
  • While the frittata is baking, place the arugula in a bowl. In a small bowl, whisk together the olive oil, lemon juice, zest, mustard, pepper, and salt. Pour over the arugula and toss to combine.
  • Once the frittata is done, let cool slightly. Top with the arugula and serve.


Tips + Tricks: You could use caramelized onions in this frittata- just cook the onions for about twice as long. I also like to make caramelized onions ahead of time.

Use leftover ingredients: Arugula, Cream, Vinegar