01 - Preheat the oven to 350°F. Lightly grease a 6-cup silicone muffin pan or line with paper liners.
02 - In a medium bowl, whisk together the egg whites and cottage cheese until smooth and slightly frothy.
03 - Stir in the cheddar cheese, spinach, red bell pepper, green onions, salt, pepper, and smoked paprika if using until evenly distributed.
04 - Pour the mixture evenly into the prepared muffin pan cups, filling each about 3/4 full.
05 - Bake for 18 to 20 minutes, or until the centers are just set and the tops are lightly golden.
06 - Cool for 5 minutes before carefully removing the bites from the pan. Serve warm or store in the refrigerator for a quick grab-and-go snack.