Spinach Tomato Frittata

Ingredients

• 1 tablespoon Olive Oil: The foundation of our flavor base. A quality extra-virgin olive oil will impart a subtle, fruity note that complements the vegetables beautifully. It’s used to sauté the aromatics, bringing out their sweetness and depth before the eggs are introduced.
• 1 small Yellow Onion, finely chopped: This humble ingredient is a powerhouse of flavor. When slowly cooked until soft and translucent, it lays down a sweet, aromatic foundation that permeates the entire frittata, balancing the other, more robust ingredients.
• 2 cloves Garlic, minced: Essential for adding that savory, pungent kick. Mincing the garlic finely ensures its flavor is distributed evenly throughout the frittata without any overpowering bites. We add it after the onions have softened to prevent it from burning and turning bitter.
• 5 ounces Fresh Spinach: This is the green heart of our frittata. Five ounces might look like a mountain of leaves, but it wilts down significantly. Using fresh spinach provides a tender texture and a clean, earthy flavor that is quintessentially healthy and delicious.
• 1/2 cup Sun-Dried Tomatoes in oil, drained and chopped: These little gems are the secret weapon for an explosion of flavor. They provide a concentrated, chewy, and intensely sweet-tart tomato taste that regular tomatoes can’t match. Draining them well prevents the frittata from becoming oily.
• 1/2 cup Crumbled Feta Cheese: For a briny, salty, and creamy counterpoint. Feta cheese doesn’t fully melt like other cheeses; instead, it softens into creamy pockets, offering a delightful textural and flavor contrast in every bite.
• 12 Large Eggs: The star of the show. Using a full dozen large, fresh eggs creates a substantial, tall, and satisfying frittata. They are the protein-packed canvas that holds all our delicious ingredients together, baking into a light yet custardy final product.
• 1/2 cup Whole Milk or Heavy Cream: This is the key to a tender, custardy frittata. While you can use any milk, whole milk or a splash of heavy cream adds richness and fat, which prevents the eggs from becoming tough or rubbery during baking. It ensures a luxurious, silky texture.
• 1/2 teaspoon Salt: A crucial seasoning to enhance all the other flavors. It’s important to season the egg mixture itself, as the vegetables and cheese will not be enough to flavor the entire dish.
• 1/4 teaspoon Black Pepper: For a touch of mild, woody spice. Freshly ground black pepper is always recommended for its superior aroma and more potent flavor compared to pre-ground varieties.
• Optional – 1 cup Diced Cooked Ham or Cooked Ground Beef: For those looking to add a heartier, more savory element, a cup of pre-cooked ham or seasoned ground beef is a fantastic addition. It transforms the frittata into a complete, high-protein meal, adding a satisfying depth and texture. Ensure it’s cooked beforehand so it just needs to be heated through in the skillet.

Instructions

1. 1

   Preheat and Prepare Your Skillet: Begin by preheating your oven to 400°F (200°C). Position a rack in the middle of the oven to ensure even cooking. Select a 10-inch, oven-safe skillet, preferably cast iron or a heavy-bottomed non-stick pan. A cast-iron skillet is ideal as it provides excellent heat retention and distribution, cooking the frittata evenly from the edges to the center and creating a wonderful golden-brown crust.

2. 2

   Sauté the Aromatics: Place your chosen skillet over medium heat and add the tablespoon of olive oil. Once the oil shimmers slightly, add the finely chopped yellow onion. Sauté the onion, stirring occasionally, for about 5-7 minutes. You are looking for the onion to become soft, translucent, and slightly sweet. This step is crucial for building the first layer of flavor; don’t rush it. Once the onions are softened, add the minced garlic and cook for another minute until fragrant. Be careful not to let the garlic brown, as it can become bitter and spoil the delicate flavor profile.

3. 3

   Wilt the Spinach: Add the entire 5 ounces of fresh spinach to the skillet. It will look like an impossibly large amount, but don’t worry. Using tongs or a spatula, gently toss the spinach in the hot pan. It will begin to wilt almost immediately. Continue to cook, stirring frequently, for about 2-3 minutes, until all the spinach has wilted down completely. It is vital to cook off any excess moisture released by the spinach to prevent a watery frittata.

4. 4

   Incorporate the Flavorful Add-ins: Once the spinach is wilted, add the chopped sun-dried tomatoes to the skillet. If you are opting for a meatier version, this is the time to add your cooked diced ham or cooked ground beef. Stir everything together to distribute the ingredients evenly throughout the skillet. Sauté for another 1-2 minutes to meld the flavors together and heat everything through. Once combined, spread the mixture evenly across the bottom of the pan and remove it from the heat.

5. 5

   Prepare the Egg Mixture: In a large mixing bowl, crack all 12 large eggs. Pour in the half-cup of whole milk or heavy cream. Add the half-teaspoon of salt and quarter-teaspoon of black pepper. Using a whisk, beat the mixture together until the yolks and whites are just combined and the mixture is a uniform pale yellow color. The key here is not to over-whisk. You want to break up the eggs and incorporate the milk, but you don’t want to incorporate too much air, which can lead to a frittata that puffs up dramatically in the oven and then deflates into a dense, spongy texture. A smooth, liquid consistency is what you’re aiming for.

6. 6

   Combine and Top with Cheese: Gently pour the prepared egg mixture over the vegetables in the skillet. Use a spatula to slightly move the vegetables around to ensure the egg mixture seeps into all the nooks and crannies, fully enveloping the fillings. Now, sprinkle the crumbled feta cheese evenly over the top of the egg mixture. The feta will stay mostly on the surface, creating a delicious, golden, and tangy crust as it bakes.

7. 7

   Bake to Perfection: Carefully transfer the skillet into your preheated 400°F (200°C) oven. Bake for 20-25 minutes. The frittata is done when the edges are set and golden brown, and the center is mostly firm with just a very slight jiggle when you gently shake the pan. If you insert a knife into the center, it should come out clean. The frittata will have puffed up significantly and will look beautifully golden.

8. 8

   Rest and Serve: Remove the skillet from the oven and place it on a wire cooling rack. This is a very important step. Let the frittata rest in the skillet for at least 5-10 minutes before slicing. During this time, the residual heat will finish cooking the very center, and the structure will set, making it much easier to slice and serve. The frittata will deflate slightly as it cools; this is completely normal. Once rested, you can run a spatula around the edge to loosen it, then slice it into wedges directly in the pan and serve warm.