Preheat the oven to 325°F (160°C).
In a medium mixing bowl, whisk together the eggs and cottage cheese until smooth (for fluffier results, use a blender).
Stir in spinach, basil, red bell pepper, chicken sausage, salt, and pepper until evenly combined.
Spray a 12-cup muffin tin with cooking spray. If you’re using a silicone muffin pan, no spray is needed.
Evenly distribute the egg mixture into the muffin cups, about 1/3 cup per mold.
Bake for 20–22 minutes, or until the egg bites are set and slightly golden on top.
Let them rest for 2–3 minutes, then carefully remove from the pan. If using silicone, you can pop them out once cooled.
Top with a sprinkle of crumbled feta and black pepper before serving.