01 - Preheat oven to 375°F. Grease a 9-inch ovenproof skillet or pie dish with olive oil or butter.
02 - In a large bowl, whisk together eggs, cottage cheese, milk, salt, pepper, and oregano until well combined.
03 - Stir in shredded cheese, chopped spinach, cherry tomatoes, green onions, and fresh herbs.
04 - Pour the mixture into the prepared skillet or dish, spreading the ingredients evenly.
05 - Bake for 20-25 minutes, or until the frittata is puffed, golden, and just set in the center.
06 - Remove from the oven and let cool for 5 minutes before slicing. Serve warm or at room temperature.