Preheat your oven to 375 degrees F. It’s important to get your oven ready beforehand so that the frittata cooks evenly. Preheating ensures a nice rise and perfect texture.
In a 10-inch oven-safe skillet, heat olive oil over medium-high heat. You’ll want the oil shimmering but not smoking. This is the foundation for sautéing your vegetables and adding that first layer of flavor.
Add the diced red onion, sliced mushrooms, chopped asparagus, and chopped red bell pepper to the skillet. Cook the mixture until the vegetables are tender, approximately 4 minutes, stirring occasionally. Keep an eye on them; you’re looking for a slight caramelization for added depth of flavor.
Next, incorporate the packed spinach leaves and minced garlic into the pan. Cook for an additional minute until the spinach wilts down. The color should brighten up, and the garlic should become aromatic.
Season the mixture with Kosher salt and black pepper to taste. This step is crucial as it enhances the overall dish. Stir well and then turn off the heat.
In a large bowl, whisk together the large eggs, cottage cheese, Parmesan cheese, and a pinch of salt and pepper. The combination should be smooth and well-blended. This will form the base of the frittata.
Pour the egg mixture over the sautéed vegetables in the skillet, ensuring even distribution. This will create a beautiful layered effect as it cooks.
Sprinkle the top with freshly chopped basil. This will add a fresh, aromatic flavor to the frittata as it bakes.
Turn the heat back to medium and cook for about 1 minute. This allows the bottom of the frittata to set slightly before transferring it to the oven.
Transfer the skillet to the preheated oven and cook until the frittata is set, around 12 to 15 minutes. Keep an eye on it; you want it just set and not overcooked, as that can lead to a rubbery texture.
Once done, remove the skillet from the oven and garnish with freshly chopped chives and additional Parmesan cheese. Cut the frittata into wedges and serve warm. Enjoy the delightful combination of flavors!
