Creating Zucchini and Feta Frittata is straightforward when you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Sauté Vegetables: In an oven-safe skillet, heat the olive oil over medium heat. Add the chopped onion and sauté for about 3-4 minutes until translucent.
3. Prepare Zucchini: Add the grated zucchini to the skillet, stirring occasionally. Cook for about 5 minutes, allowing the moisture to evaporate.
4. Mix Eggs: In a mixing bowl, whisk the eggs. Season with salt, pepper, and dried oregano if using, then add in the chopped parsley.
5. Combine Ingredients: Pour the egg mixture over the sautéed veggies in the skillet. Sprinkle the crumbled feta evenly on top.
6. Cook on Stovetop: Allow the frittata to cook on the stovetop for about 5 minutes until the edges begin to set.
7. Transfer to Oven: Carefully place the skillet in the preheated oven. Bake for 15-20 minutes until the frittata is fully cooked and puffed up.
8. Cool and Slice: Remove from the oven and let it cool for about 5 minutes. Slice into wedges and serve warm or at room temperature.

These clear steps make it simple to enjoy a delicious and fulfilling breakfast!