Preheat oven to 350°F (175°C).
Grease a 6-cup muffin tin or use silicone muffin cups.
In a medium bowl, whisk the eggs.
Add the cottage cheese, cheddar cheese, spinach, red bell pepper, salt, and black pepper. Stir to combine.
Divide the egg mixture evenly among the prepared muffin cups.
Bake for 20-25 minutes, or until the egg bites are set and lightly golden brown.
Remove from the oven and let cool for 5 minutes before serving.
