Preheat your oven to 375°F (190°C). Grease a 9-inch pie dish or 8×8 baking dish with nonstick spray or butter.
In a large bowl, whisk together eggs, cottage cheese, shredded cheese, milk, salt, and pepper. Stir in garlic powder if using.
Fold in your chosen diced vegetables, meats, and herbs.
Pour the mixture into the prepared baking dish and spread evenly.
Bake for 30-35 minutes, until the quiche is golden on top and set in the center. Test doneness by inserting a knife which should come out clean.
Let the quiche cool for 5-10 minutes before slicing. Serve warm or cool completely and store for meal prep.