Preheat your oven to 300°F and lightly grease a silicone muffin tin with the extra virgin olive oil.
In a high-speed blender, combine the whole eggs, egg whites, cottage cheese, sea salt, and black pepper.
Blend on high for approximately 30 seconds until the mixture is completely smooth and frothy.
Finely chop the fresh spinach and distribute it evenly into 6 of the muffin cups.
Pour the blended egg mixture over the spinach, filling each cup about three-quarters of the way to the top.
Top each cup with a small sprinkle of crumbled feta cheese.
Place the muffin tin inside a larger roasting pan and pour 1 inch of hot water into the roasting pan to create a water bath.
Bake for 30 to 35 minutes until the egg bites are set but still have a slight, delicate jiggle in the center.
Remove from the oven and let the bites cool in the tin for 5 minutes before gently popping them out to serve.