Chop the Onion into long strips and cut the cherry tomatoes in half.
Arrange a rack in the middle of the oven and heat the oven to 350°F
Heat Olive Oil in a non-stick pan and saute chopped onion, cook until caramelized.
Add cherry tomatoes and spinach, saute until softened.
Add spices (salt, pepper, cayenne and garlic powder)
Mix and set aside
In a bowl, mix eggs, cottage cheese, heavy cream, and cheddar cheese.
Add spices (salt, pepper, onion powder) and mix
Add the sautéed vegetable mixture to the baking dish and pour the egg mixture over it, covering it.
Use a fork to move the vegetable mixture around to your liking.
Sprinkle crumbled feta over the egg mixture and place it in the oven.
Bake in the oven for 20-25 minutes
Once cooled down, cut the frittata into even sqaures and serve.