Preheat the oven to 375°F (190°C). Grease a 12-cup muffin tin with butter or use silicone muffin cups for easy release and cleanup.
Fry bacon over medium-high heat until crisp.
Transfer to a paper towel-lined plate and let cool slightly.
In a medium bowl whisk the eggs with salt and pepper and nutmeg.
Add the cream.
Add cottage cheese.
Add the feta cheese.
Add the green onions to the egg mixture.
Add the chopped bacon, and stir to combine.
Divide the egg mixture evenly into the silicone cups.
Fill each about three-quarters full.
Bake in the preheated oven for 25–30 minutes, or until the tops are golden brown and the muffins have puffed up and set in the center.
Let the egg muffins cool slightly in the pan before removing. Serve warm or at room temperature.