01 - Preheat oven to 350°F. Grease a standard 12-cup muffin tin with cooking spray or a light coating of olive oil.
02 - In a large mixing bowl, whisk together the egg whites, cottage cheese, salt, pepper, and garlic powder until smooth and well incorporated.
03 - Gently fold in the diced bell pepper, chopped spinach, green onions, and shredded cheddar cheese until evenly distributed throughout the mixture.
04 - Divide the mixture evenly among the 12 prepared muffin cups, filling each approximately 3/4 full to allow room for rising.
05 - Bake on the center rack for 18 to 20 minutes, or until the egg bites are firmly set and lightly golden on top.
06 - Allow the egg bites to cool in the tin for 5 minutes before carefully removing. Serve warm or at room temperature.